Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb276925cc99138…

MALICIOUS

PDF

67.4 KB Created: 2020-07-30 10:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9f6332bfd6f78df9723054c64df2b8ca SHA-1: 1a1ad2b267b74a6ef01f17699516b1277705e16b SHA-256: 1bb276925cc99138ed67e6ea3f68c5f50c7055fad4a37f479400bda9fd19cfee
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'ap scert text books pdf download'. The presence of a malicious redirector and a link farm indicates an attempt to direct users to harmful content, likely for phishing or malware distribution. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=ap+scert+text+books+pdf+download In PDF document text
    • http://files.smilecommunicationsgroup.com/uploads/1/3/2/6/132681002/vebevemiru.pdfIn PDF document text
    • http://files.reviveinteriorsnw.com/uploads/1/3/0/7/130776573/2295007.pdfIn PDF document text
    • http://files.mrball.org/uploads/1/3/2/8/132814906/8685016.pdfIn PDF document text
    • http://files.wholesalewarehouse.ca/uploads/1/3/1/1/131164440/8807050.pdfIn PDF document text
    • http://files.hoxieonline.com/uploads/1/3/1/8/131856133/2144257.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9424/4516/files/42482519791.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/jizewugetegadikukinewozuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4586/9985/files/rifijemuroxabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6151/8231/files/kibuvir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2342/3912/files/gogovilemawafamep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/28794540357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/12840262371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/zusafolalujudekijumud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/93902843979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/98903966495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2236/0469/files/radivejapemokagotudik.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E5 5240 bytes
SHA-256: fdd44886c7bca53df2dcce8db782b4144b652519d669887d0339fb5c72ace025
font_01_sfnt_off000088c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C8 23988 bytes
SHA-256: 99fa176e76f84c6d8289e5f777ab425da6aedc4f607fdcd38a1cb07a58ea118d
font_02_sfnt_off0000bcec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCEC 2320 bytes
SHA-256: 5e067315a2bd9524b6254977960f062bb129990ed69868068e29b4596197f3c8
font_03_sfnt_off0000c73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73F 10020 bytes
SHA-256: 3e647d1348510cf8f600be41d457ad4eb07be3084a64c79eb2b3d25692cda09e
font_04_sfnt_off0000e9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B4 16224 bytes
SHA-256: a349519ccbdbca3d75704c2becf615ab37801eb1543272228454131dceb83acc

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