Malicious PDF — malware analysis report

Static analysis result for SHA-256 f853c426f6d94aee…

MALICIOUS

PDF

39.4 KB Created: 2020-08-05 02:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e2fdaeb2976964b3940f9943f132b18c SHA-1: 7f1d4f461794b77bd929aa495a5b54fd3cb3cab1 SHA-256: f853c426f6d94aeeb7226188b62ec2525bd32fe5c78ae42d5b096c8b56ea0da2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, including a critical redirector link to 'ttraff.cc', which is likely used to obscure the final malicious destination. The document body, though partially corrupted, contains text related to merging PDFs and includes the malicious URL, suggesting a social engineering lure. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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=merge+pdf+mac+free+online In PDF document text
    • http://files.risehairinc.com/uploads/1/3/1/6/131637546/7290640.pdfIn PDF document text
    • http://files.wellingtonunited.org.nz/uploads/1/3/1/3/131398143/potosimiju.pdfIn PDF document text
    • http://files.whhstdc.com/uploads/1/3/1/6/131607019/ruwegifomu.pdfIn PDF document text
    • http://files.your-gal-friday.com/uploads/1/3/0/8/130814397/dugedifipuk.pdfIn PDF document text
    • http://tafas.westkellowyurts.com/uploads/1/3/1/3/131398091/kezewixe.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/1/0436/5756/0217/files/78408120922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/critical_thinking_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/agenda_2020_francais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5302/1334/files/kitchenaid_ice_cream_maker_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3390/1726/files/20863294988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/lidatipemidoxat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6256/5781/files/28796711831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/zoxogijoxevew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7652/5984/files/93971278972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/29337291107.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_off00005ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF9 5300 bytes
SHA-256: a6f318fa573d889fda978d0b38ccd6503ed0647881534886f63e1d8796f9f8a1
font_01_sfnt_off000070ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70FF 9364 bytes
SHA-256: 1dd1d049acd45ce2a99908f56674d4cce4d19fb5911894bc324e8795a2538e99

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