Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b72bbebf9c31aa1…

MALICIOUS

PDF

47.0 KB Created: 2020-08-06 07:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 063805904d2c78162e9c65c406eac074 SHA-1: 972726353eaeefe0a10db92209b4baff8c76e3bf SHA-256: 3b72bbebf9c31aa1d7fda972eee0724cd5004a60c14551ac8a48cd6fe78a6cbf
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure via the URL https://ttraff.ru/pify?keyword=aspergillus+niger+adalah+pdf. This suggests the document is designed to lure users to malicious sites. No scripts were extracted from this sample.

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.ru/pify?keyword=aspergillus+niger+adalah+pdf In PDF document text
    • http://files.whitewavemedical.com/uploads/1/3/0/7/130738803/dedozul.pdfIn PDF document text
    • http://files.muskegonrenew.com/uploads/1/3/1/1/131164572/4197e50f76e.pdfIn PDF document text
    • http://files.mindraym5.radiologyequipmentstore.com/uploads/1/3/1/4/131438759/sisexiwavax.pdfIn PDF document text
    • http://files.onegoverningbody.com/uploads/1/3/1/8/131871740/kerojodiseg.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/1/0437/4695/1319/files/python_curses_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3300/2145/files/sowoxedaregofatew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7741/0720/files/pofulopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/29878061118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/croft_syntactic_categories_and_grammatical_relations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/parifugibawavebanim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1103/7589/files/intermetallic_matrix_composites.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/monogekabixelejilenoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/kukizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/7180249981.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 8

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_off0000784a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x784A 5292 bytes
SHA-256: 2aa61ab985f7ffeffb8a9cc9ed5c827d89a393628477c09decebb50c653dfc0c
font_01_sfnt_off00008a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A45 10784 bytes
SHA-256: b5d2fb7cc77de771bb61f2154eac7025c9012ef0580c7a2bb8a82570317ffdaf

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