Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf72878b6718c7da…

MALICIOUS

PDF

43.7 KB Created: 2020-08-19 14:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aeb662e75a45e87c36feb32a0f9d0a58 SHA-1: 44619caed3bfef5fdea1a794edaed93d38da98a9 SHA-256: bf72878b6718c7dab318473c35de86f27f97603a65f50bafc1aa95ef069789b2
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. This link is presented with a keyword suggesting a software download, indicating a lure for users seeking specific applications. The ML classifier also strongly flagged this PDF as malicious. 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.cc/pify?keyword=avg+pro+apk+latest+version In PDF document text
    • http://kotirudid.catherinegtripp.com/uploads/1/3/0/7/130740596/pekijizutiwatedomil.pdfIn PDF document text
    • http://files.nancylarondajohnson.com/uploads/1/3/0/7/130738984/xoregupasokeb_lixuxagubafo.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/1/0431/3330/4993/files/86010265968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/wowhead_blazing_drake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4189/0209/files/lapiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2518/4421/files/deguxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6329/5654/files/two_dimensional_array_example_program_in_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5021/3274/files/58226735366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5543/1323/files/discrete_mathematics_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6350/8121/files/70641323829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8833/0396/files/1337979830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6114/8832/files/46834839327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/rasukuxafuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9920/8346/files/curriculum_mapping_example.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 2

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_off00006cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBB 5100 bytes
SHA-256: 05977d921ad3ca05c6b1d32762449a756a58dc74ec98da4e3685aee8269b62af
font_01_sfnt_off00007e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E33 10504 bytes
SHA-256: 7ccac565c8b9dce4368a27344a584537f448527425a758f37168850a0bdd9d55

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