Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8f32fe96f2a6cd…

MALICIOUS

PDF

44.9 KB Created: 2020-08-15 10:39:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7d95ba6fb0e4e1373aac1f6b9822645f SHA-1: f4cf0cf39ae98cb7241ec585ff8cfe77b70859a1 SHA-256: 4f8f32fe96f2a6cd24be30948a7a6001a5cb1a5b07dae54fa21af5e9febc617d
214 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a manual download, which is a common lure for phishing or malware delivery. The document body, though heavily obfuscated, contains the malicious URL and several other benign-looking URLs, likely part of a link farm to improve search engine ranking and visibility. The presence of a callback lure heuristic further supports a phishing or scam intent.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.ru/pify?keyword=gmc+acadia+denali+2013+manual In PDF document text
    • http://files.troop437roslyn.com/uploads/1/3/2/8/132815172/9085aef.pdfIn PDF document text
    • http://zefeluk.drronmartinez.com/uploads/1/3/2/7/132712615/nuxogeteto.pdfIn PDF document text
    • http://files.intimatesmallweddings.com/uploads/1/3/1/8/131871488/a6a1aeeccca9.pdfIn PDF document text
    • http://kuwinot.gsaathletics.com/uploads/1/3/1/6/131637814/dotemuw.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/1/0430/7533/8389/files/gewof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/37822639746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6107/6387/files/ballade_deutsch_klasse_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/kijejuzebeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7334/6465/files/11343289804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7676/4327/files/64342394699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6462/2246/files/jowagawevamuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/96804917670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8023/4661/files/engineering_drawing_1st_angle_3rd_angle_projection.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1357/6603/files/essentials_in_haematology_and_clinical_pathology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/giremo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70EF 5332 bytes
SHA-256: c465c1a58b32970c210ed493c06e19c7cbd26f7b75d84235b31f6b889216af60
font_01_sfnt_off00008300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8300 10548 bytes
SHA-256: 45fc42b27a4d3a5c1155a759ace2ee007d73eece2f9e3cd0a5208128dedc7ffe