Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a3915478e28d5e…

MALICIOUS

PDF

59.0 KB Created: 2020-07-31 14:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 84e77b15b161cf6a35216d02517bd03d SHA-1: 58dc14bcc0eb30b30f77738fc9057571e063a743 SHA-256: 37a3915478e28d5ed6330b290c4cc2a3f529115c39197f4f7bbe9f17c56ccefe
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used in SEO link farms to manipulate search engine rankings or to hide malicious redirects. One of the embedded URLs, 'https://ttraff.com/pify?keyword=bacteremia+e+septicemia+pdf', is identified as a known malicious redirector. The document body appears to be corrupted or heavily obfuscated, preventing a clear understanding of its intended content beyond the presence of 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.com/pify?keyword=bacteremia+e+septicemia+pdf In PDF document text
    • http://files.saaabeoftexas.com/uploads/1/3/1/4/131437766/d2f720d3.pdfIn PDF document text
    • http://files.aikenpsr.com/uploads/1/3/1/8/131872079/lazabudibinanet.pdfIn PDF document text
    • http://files.beaufortpictureshow.org/uploads/1/3/0/7/130738914/9f14006e89b.pdfIn PDF document text
    • http://files.foothillsbiblefellowship.com/uploads/1/3/0/7/130776776/tixanuzipef.pdfIn PDF document text
    • http://files.stevenciezkiglass.com/uploads/1/3/1/6/131606984/fef66dd72e2d.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/1/0431/0741/8273/files/70892853878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/sebironi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/36162803843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/xesipetozifodugepikawemip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2013/2247/files/voxelisugelazuzuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6199/1841/files/birozulujej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/11428469570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/66326969671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/xojusogewaravelopoxukonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/popumuwejomir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8447/1710/files/38245602856.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 7

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_off0000aa51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA51 4892 bytes
SHA-256: ca7beb9161fb67f86371934e1e7703473f9459c4c9a4ae97f26b153ccc1e157d
font_01_sfnt_off0000baef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAEF 10692 bytes
SHA-256: d29f85fba1c02216d0cef587274357693370b837537ec6aa4dcab0b969dc3a11

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