Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e67d601b4281049…

MALICIOUS

PDF

37.2 KB Created: 2020-08-14 19:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8307f4160259794d54044b50d6e7763c SHA-1: cab36b01de3b7dd0b182960cb70a5e1b584ced68 SHA-256: 4e67d601b4281049506ef6611023d987616c88c446ff0dea7bbecdfd2f806cdb
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a computer textbook and the malicious URL, suggesting a lure to download further malicious content. The presence of a link farm heuristic further supports the malicious intent of distributing links.

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.cc/pify?keyword=understanding+computers+today+and+tomorrow+15th+pdf In PDF document text
    • http://files.yfeproductions.org/uploads/1/3/0/8/130815277/powelediw_xifikirewuvaro.pdfIn PDF document text
    • http://files.maylingmartinez.com/uploads/1/3/0/8/130874554/7f50aa65e6b93d.pdfIn PDF document text
    • http://files.martinomartinicenter.org/uploads/1/3/1/4/131406826/bazita.pdfIn PDF document text
    • http://files.animuspharma.com/uploads/1/3/0/8/130874587/lisixajizizi.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/1/0428/3390/3783/files/90293268544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0729/6163/files/jogufufow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/8263109845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/bavevipurimojug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48465164240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0948/1626/files/silabus_biologi_sma_kelas_xi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0591/0933/files/12202452139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/galaxy_buds_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9815/2866/files/29092598392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/koxumugude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/all_rules_of_articles_in_english_grammar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/59663248824.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 4

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_off000051bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51BD 5900 bytes
SHA-256: dc09b83180a467f0b212283d952ef3426eb6b72079cd324e0e562d74ce107348
font_01_sfnt_off000065c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C5 9804 bytes
SHA-256: 1920f7c99c44c78045fb457c3ad12687e3d5e67fa0ff099cc501ebd8ebdc0128

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