Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4085b56fe7406c5…

MALICIOUS

PDF

41.2 KB Created: 2020-08-19 03:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 315ed458a66cf93f10b1192ffd51a64a SHA-1: 65e897e0c77d55cf59ab2aea93c5f50da6a2ded1 SHA-256: a4085b56fe7406c59a8363228d161dfd1cb512802a2e10faffe1098d4491209c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to software and URLs, suggesting a lure for users to download or access malicious content. The ML classifier strongly indicated maliciousness, and the PDF structure itself contained multiple external links, many hosted on cdn.shopify.com, indicating a link farm designed to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ttraff.com/pify?keyword=chessbase+12+free In PDF document text
    • http://files.justflowfun.com/uploads/1/3/2/6/132681660/fusezetu-fuzokenokamirot.pdfIn PDF document text
    • http://files.studio17hairsalon.com/uploads/1/3/1/1/131163859/bezumo-fovovulewijokew-sizifolarugusi.pdfIn PDF document text
    • http://files.wasatchwingschapterh.org/uploads/1/3/2/6/132680908/0ca753450069.pdfIn PDF document text
    • http://tavum.caincrossingpoa.com/uploads/1/3/1/3/131379732/4335909.pdfIn PDF document text
    • http://wewofot.sonchaserrv.com/uploads/1/3/0/8/130873851/7982259.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/autocad_2010_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/nuzafurezuxamabozatetune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/vetanonafuzovorojewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4945/9605/files/4014272551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0630/4166/files/gesajenuxaxekokubusafero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0349/3022/files/fanasetulujemenunaditu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6567/1833/files/35173051868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7496/8986/files/bedrock_font_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6237/7113/files/519692178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/17269338802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/14515244228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/mixixuripugugutejenexi.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

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000633c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633C 5052 bytes
SHA-256: 058cae06c390fe2c1b4aa8f1a8849523c8328490736334b2d5cd9b787da6a160
font_01_sfnt_off00007465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7465 10560 bytes
SHA-256: d047b85943177f91931cdee36f4ae9dd0134d9dc69eeb50573bd269ea60027a5

Open this report in the interactive analyzer, or submit your own file for analysis.