Malicious PDF — malware analysis report

Static analysis result for SHA-256 7813e4471567ed21…

MALICIOUS

PDF

44.5 KB Created: 2020-08-10 04:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a500978e8c60ac7b3017d16424e21cd6 SHA-1: 8951ef26a0ab2ba359a6a9149bfac238c142a30c SHA-256: 7813e4471567ed213be28ba29b3861612d3ee7a225ebf73b2f88f16c8c6b107b
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The document body and heuristics indicate a link farm designed to lure users, likely for phishing or to download further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=abdominal+surgical+incisions+pdf In PDF document text
    • http://files.omnibusologist.com/uploads/1/3/0/9/130969761/duduzutitavaxu.pdfIn PDF document text
    • http://files.theprowlradio.com/uploads/1/3/1/8/131858287/mazageliku-futiboxu-penekizumalujo-laniji.pdfIn PDF document text
    • http://files.toronto-dialabottle.com/uploads/1/3/1/4/131406258/lowafenawidimepofazo.pdfIn PDF document text
    • http://files.asteripursuit.com/uploads/1/3/1/0/131070207/punomeko.pdfIn PDF document text
    • http://files.pennjournalconlaw.com/uploads/1/3/2/6/132682694/bawibixijuzawo.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/1/0436/9245/8152/files/wepogezaxoxezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3171/4202/files/interior_and_exterior_angles_of_triangles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1883/0503/files/environmental_sociology_theories.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2250/8454/files/32334850197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4315/1272/files/luloximu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/2737077687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5330/0377/files/diluvubeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9480/9507/files/kuwiruwumuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/28942474401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0243/7527/files/bullets_and_numbering_in_ms_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/77563988741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1571/4469/files/adobe_font_package.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/mawevikifasalexopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0493/5835/files/small_to_word_free_download.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B94 5604 bytes
SHA-256: e1f0edb259eac87cf7ab8ca1fe042a79e7ca31c9c77bf5831063dbb69b470142
font_01_sfnt_off00007e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E87 11920 bytes
SHA-256: 933b4fd1d58485132f6fc52151f5e8a1b2d4b18a14987ca51d68d74efcbc120e