Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5cca26667d71328…

MALICIOUS

PDF

52.4 KB Created: 2020-08-13 02:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d555ce54668f3941f3485d14d1fb86ea SHA-1: 4125820bbb1e46313db543fb92f312a680cc5e21 SHA-256: a5cca26667d7132859bea05ab709bc0b717ca04502615257457958dba09cf753
194 Risk Score

Malware Insights

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

The PDF contains a direct link to a known malicious redirector, ttraff.com, which is disguised as a sewing pattern. This heuristic, combined with the ML classifier's high confidence score, strongly indicates malicious intent. The document body, though heavily obfuscated, contains the same URL, reinforcing the lure. The PDF also contains a large number of links to Shopify, likely part of a link farm 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.com/pify?keyword=boxer+shorts+sewing+pattern+pdf In PDF document text
    • http://files.chippewakeryx.org/uploads/1/3/1/4/131406684/wavatidofukobiroko.pdfIn PDF document text
    • http://senikile.theloyocompany.com/uploads/1/3/2/6/132681670/53085.pdfIn PDF document text
    • http://files.flowersbywillows.com/uploads/1/3/0/7/130775840/roxumazapevira-nuzawovabuliman-teletuno-juvevisamuna.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/1/0434/5698/7303/files/45491006677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0652/4583/files/manual_de_biomagnetismo_holistico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5811/8312/files/area_of_irregular_shapes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/xapovelap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3174/6967/files/vepofatexuwuguroseburuzoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/ranezaxijunomena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4545/2967/files/rudejus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5233/5255/files/rexiseremogaxakuzipak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5982/9149/files/ventajas_y_desventajas_del_aprendizaje_colaborativo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/78413143520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4374/9029/files/17854340472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/dozuxepuvo.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_off00008e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E53 5480 bytes
SHA-256: cadea1226c78e0db13a4e06a835e60d3e95990dfd6094729b56c704c49dbd973
font_01_sfnt_off0000a110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA110 10360 bytes
SHA-256: f39544aaeaf937fa94d17bb5bf9643f935a96e67bbcb2483252f62f3ff993ce3

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