Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c3396c6a4028a0…

MALICIOUS

PDF

58.0 KB Created: 2020-08-07 00:03:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99f5b4a3b8e015b7050934a175c8113b SHA-1: 436c315e9b8d0788d761a0c04f90fcbc99d7816a SHA-256: 26c3396c6a4028a0cc7ece4e7e2edcd88a7e22f4597d8b80aa35379db5299b1b
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, many of which point to external PDF files. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to the same URL, suggesting a lure or redirection mechanism.

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=makalah+biogas+dari+kotoran+sapi+pdf In PDF document text
    • http://files.dawnentertainment.net/uploads/1/3/0/7/130775403/659c3.pdfIn PDF document text
    • http://files.jacksonswim.com/uploads/1/3/0/7/130739614/b671a79d958.pdfIn PDF document text
    • http://files.unitedk-12wrestling.com/uploads/1/3/1/4/131410736/915e083595.pdfIn PDF document text
    • http://files.connectivehealingservice.com/uploads/1/3/1/4/131438459/bb6761c.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/1/0429/5720/9753/files/85549004925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/xurepijazinajoriwuxize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/shadows_mantle_set_dungeon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/8849281789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/operations_management_krajewski_10th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0668/0484/files/31058700280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/79894634426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/xaganejavufasetude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/furupokexopaxabisovijuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/multiplicative_vs_additive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/37170064326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7166/7360/files/57407651821.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/23392668276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.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 6

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_off00009eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB3 5512 bytes
SHA-256: e25260988b0d10c9d0c091439c92848de9dae9b92e9ca61bccf907084e242aa8
font_01_sfnt_off0000b16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB16F 13372 bytes
SHA-256: 5189dc346b20a33ca701d417faac760b5d00cf58e605d44d4b53f67aebe2c980

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