Malicious PDF — malware analysis report

Static analysis result for SHA-256 f44335e97e906048…

MALICIOUS

PDF

53.2 KB Created: 2020-08-07 23:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 637b41c0c5347ba8f1c88f2d00fd5ce3 SHA-1: 92a1d83dddfaf7097ffba772675a2e3541762a22 SHA-256: f44335e97e906048187bd894feb8a838c369d492515b92ae57f5ff90a0500619
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to a 'human rabies vaccine PDF'. The presence of numerous links to Shopify-hosted PDFs suggests an attempt to blend malicious content with benign files, likely to evade detection or improve SEO for malicious content. The primary malicious URL is https://ttraff.com/pify?keyword=vacina+antirr%25C3%25A1bica+humana+pdf.

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=vacina+antirr%25C3%25A1bica+humana+pdf In PDF document text
    • http://files.littlepodcastontheprairie.com/uploads/1/3/1/4/131437474/wimamefesudu.pdfIn PDF document text
    • http://files.millerhomesgroup.com/uploads/1/3/1/4/131437775/zejogito_morasiv_tedogipifik.pdfIn PDF document text
    • http://files.writingsofwhitefeather.com/uploads/1/3/1/3/131381881/favure_jesawoji_vefusevopukuje_jikifulatab.pdfIn PDF document text
    • http://files.reardondigital.com/uploads/1/3/0/8/130814078/bfe06f3306b4756.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/1/0431/5673/4109/files/kasiwafojefolami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/lewajegupiwojorefifire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7176/6681/files/kirexijasam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/dehydrohalogenation_of_alkyl_halides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5020/4316/files/juduxelaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7630/5564/files/88314158058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7938/5756/files/osrs_chaos_rune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6470/4665/files/svm_in_r.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6811/9453/files/38995209757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/48937277174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3640/0037/files/31575875241.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_off00008d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D55 5524 bytes
SHA-256: 7cf8d96c634ae57e62b40d891b23da148459c55be1df0db8b11059df0fba0a0a
font_01_sfnt_off00009f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F65 12128 bytes
SHA-256: 707edc2dc5d1e753178d84966273dc6ebe4e8640a5ad056b87b3a4578f0d13bb

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