Malicious PDF — malware analysis report

Static analysis result for SHA-256 81618a72fd489a2f…

MALICIOUS

PDF

60.7 KB Created: 2020-07-28 20:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5d1e0722306156413ca4ae4958802bb6 SHA-1: 1412681d2cfb1e1b0019e4a52b51ba489371d4c9 SHA-256: 81618a72fd489a2f131bce4cabc0fa0c541b2d48fdf6781b012b950f7d98c0c4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to a redirector service (ttraff.cc) which is flagged as malicious. This suggests the document is designed to trick users into visiting a malicious website, likely for phishing or malware distribution. The presence of numerous external PDF links also indicates a link farm strategy to improve search engine ranking for 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=ernakulam+district+map+pdf In PDF document text
    • http://files.victoria-security.com/uploads/1/3/0/7/130776511/mekog_jesatokasuzisi_mibilugorapumo_vukesogezafij.pdfIn PDF document text
    • http://files.ardasphotography.com/uploads/1/3/1/4/131483153/zelotilibivunotapot.pdfIn PDF document text
    • http://files.delightthyself.com/uploads/1/3/1/6/131607269/bogatexan.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/1/0429/4973/8650/files/pekumijenigezego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8202/3061/files/gixoginewodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/rawomajovonoroveletap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/kemarazamupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/nejojezidojakijibenas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1661/8145/files/ruxipiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/25023314554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/16536725220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/82466450859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99237037604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8806/0320/files/78992978383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7729/5521/files/vozivaboziwawakesorines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5785/7187/files/79346951271.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
🗂 Part of campaign: ardasphotography.com 5 samples

Related samples 5

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_off0000a768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA768 4976 bytes
SHA-256: 3a868adf7cbfe661310526ea5fc2f84a26a2bf94894f8a3c18a7aa513037a28f
font_01_sfnt_off0000b829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB829 14600 bytes
SHA-256: c0281a4b754f447af1163d0111d49aa98aed5f04306d1553d81f0dfbe6d4993a

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