Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7786853e045dac4…

MALICIOUS

PDF

44.8 KB Created: 2020-08-05 11:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fe6dee160df3f16ea55d99e3f5a7ce37 SHA-1: a427e474569671b039a4ab53842f20bb90badeda SHA-256: a7786853e045dac40bc89dc6ad88bd2d063800ef1fc1760a029b8669274da65e
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, contains the URL https://ttraff.cc/pify?keyword=critical+reading+and+writing+skills+pdf, which is likely intended to redirect the user to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector.

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=critical+reading+and+writing+skills+pdf In PDF document text
    • http://files.insidepassageseminars.com/uploads/1/3/2/7/132740291/vojidep-vodexe.pdfIn PDF document text
    • http://files.firmfactoryafrica.com/uploads/1/3/0/7/130739348/f7f49708b14.pdfIn PDF document text
    • http://files.robirie.com/uploads/1/3/1/4/131410007/4828545.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/1/0433/1061/2635/files/21415405729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8699/3813/files/tnpsc_answer_key_group_4_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/87919260388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/zetowopitaxigipatukes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5706/7685/files/14003611422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/godikuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1118/6588/files/binondo_food_wok_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7555/7793/files/61686395390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2742/2632/files/83185822361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/63585491250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/what_is_a_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8299/7148/files/business_proposal_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/pabejotiguxarew.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_off00007170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7170 5384 bytes
SHA-256: adfeacc808af915ab9ff2835c05671626e9113c2b4b5cb28840ff33eb67a951e
font_01_sfnt_off000083e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E4 10012 bytes
SHA-256: 4d16599be8a6f846bcc44a660c217d77a2ace2f88d86722b1c8c5b244ba5608a

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