Malicious PDF — malware analysis report

Static analysis result for SHA-256 3687c54df31138e7…

MALICIOUS

PDF

36.8 KB Created: 2020-08-01 14:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ec31252499364100256a59cb26ce1655 SHA-1: 241e0379c382cde213a3c1088f9382c44c18429d SHA-256: 3687c54df31138e767b085fca7faabeee25b35cf87bd35e5a30b1eb99d128751
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body and embedded links suggest a lure to download a textbook, but the primary link redirects to 'ttraff.cc', a known malicious redirector. This indicates a phishing or social engineering attack aiming to lead the user to malicious content.

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=organic+chemistry+2nd+edition+david+klein+pdf In PDF document text
    • http://files.designtimegnc.com/uploads/1/3/0/8/130874026/4512394.pdfIn PDF document text
    • http://files.mapletreemw.com/uploads/1/3/1/4/131438541/5995039.pdfIn PDF document text
    • http://files.positiveposturenz.com/uploads/1/3/1/4/131483550/sivaf_polatafi_zuwovil.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/1/0434/3565/5335/files/baboker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/73514079904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3996/2774/files/mofebapebenobikuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7624/7971/files/2127088977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/can_you_copy_and_paste_from_kindle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/tatimoseruvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ziduvawijixivobufanevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2131/9839/files/magic_weapon_ds3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8406/9526/files/33542386179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8666/7158/files/konowuxatitibatefikap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5920/7582/files/79560737728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54341666742.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_off00005118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5118 5952 bytes
SHA-256: 7f4044943e6a46bea605673d4950370e7453a3ef075f8262efda414a62777f46
font_01_sfnt_off00006541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6541 9700 bytes
SHA-256: 3d3f6d003cf41fb8d9f3356b2a94c86cd997f65f3e786e7d94cd5de5fb223dd0

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