Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4d2c434df127c74…

MALICIOUS

PDF

89.6 KB Created: 2020-11-08 03:06:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8d74a95d64094b5d2d4f6258ab28ce20 SHA-1: 7aa67ccfc70853ffd6fbe18d5353a8e204022de6 SHA-256: a4d2c434df127c74406054e9c06688e3d3e75f18e596c090e4f8526ef04d0865
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, pointing towards a phishing or scam attempt. The embedded URL https://gettraff.ru/123?keyword=ap+euro+exam+review+study+guide+cram+packet is identified as a malicious redirector. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to direct users to malicious infrastructure, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • 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://gettraff.ru/123?keyword=ap+euro+exam+review+study+guide+cram+packet In PDF document text
    • https://s3.amazonaws.com/lezopobigeza/book_acknowledgement_sample.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416493/normal_5fa4b8546bb84.pdfIn PDF document text
    • https://daxedinojadu.weebly.com/uploads/1/3/4/5/134590150/2290456.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/aines_dosis_pediatricas.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/9882322.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/a_short_history_of_neoliberalism.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/0b7625bfcdb5.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/36448421219.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5f9a5a9867bc8.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/5014488.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://pevejimo.files.wordpress.com/2020/11/tenopegavujanup.pdfIn PDF document text
    • https://xozolow.files.wordpress.com/2020/11/ombres_a_la_foscor_resumen.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC6 6872 bytes
SHA-256: cfd810a5ea282119da4c1abf509a1e6bf8c77e42bfdbea3e308bbcdcc7c40f73
font_01_sfnt_off0000b01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB01C 5512 bytes
SHA-256: 73ddc501a7f1ecd1129cfb6f7618ab10ad42b4c5c6e75b63eecb1b4cfd0969a7
font_02_sfnt_off0000c2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FD 31144 bytes
SHA-256: b4f907b127f2c76b06cd456eeec5930a26b19a10cae331726436c3ecd86d877d
font_03_sfnt_off00010d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D43 11328 bytes
SHA-256: ac37422a193eb229d0cc0f45c960af9cee2cd59311c5ccc01c6792aef93c7e91
font_04_sfnt_off00013405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13405 16312 bytes
SHA-256: d03d3bc7aa1dc9b3ee7f2040365c2db1e3c0c7a7d0e6d8ee51344ddbcb5fc0ea
font_05_sfnt_off0001499e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1499E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361