Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cef271a9cbeac9f…

MALICIOUS

PDF

46.5 KB Created: 2020-08-10 08:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a32bffc1ae67ffbe283d98624d6f4c3e SHA-1: ffb3bd00996daa285b38aaeedde2d7ea3d607f84 SHA-256: 0cef271a9cbeac9f6524fdaabcb709c14fbf0a75f27a2b64ff67b8f9dc963eaf
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains URLs that are part of a link farm designed to appear as legitimate content. The ML classifier strongly indicates maliciousness, and the presence of embedded links points towards a social engineering attack.

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=cost+accounting+summary+notes+pdf In PDF document text
    • http://files.synbim.co.uk/uploads/1/3/1/4/131438899/236290.pdfIn PDF document text
    • http://files.rockthecatspa.biz/uploads/1/3/1/8/131871571/xijofisewib.pdfIn PDF document text
    • http://files.designingloveandstyle.com/uploads/1/3/2/6/132681985/zawofaveroxobazo.pdfIn PDF document text
    • http://files.karenglinski.com/uploads/1/3/1/3/131384442/komixevepidas.pdfIn PDF document text
    • http://files.menomineewatershed.com/uploads/1/3/1/4/131453950/rugewoxiwumerafokura.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/1/0439/3605/5454/files/39053875995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9745/6801/files/61539729137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/63161667277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5552/1695/files/wunufugopakavaralek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/vugunubirosoxekigez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6117/7507/files/ap_sachivalayam_digital_assistant_notification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/taxetoto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7218/3703/files/39967889075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/dinujibafoxegike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1927/0306/files/58690082613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/231428144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/7049/3596/files/airman_compressor_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/24627211532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4055/2598/files/alienware_15_r3_specs.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_off0000782d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782D 5448 bytes
SHA-256: 60700cddbdbde4086b00ad8d777588800472c2af82d04fb2fbcb111b5359cd5b
font_01_sfnt_off00008aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA6 9836 bytes
SHA-256: 7e470d9adbe42a0a4f61365fcc6abc234bfff25f99508905e8517d9e4180592d