Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf8310e65558a0a…

MALICIOUS

PDF

45.7 KB Created: 2020-08-18 22:26:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7c1e6f7e7a4cc07ff28f03cad7466d52 SHA-1: c9639b62116a8156e2cb2f0fd6a31f9456ef155f SHA-256: 4cf8310e65558a0a6f46f2fe265b393f6300192ca717ad3fecca8d7fcbc26fbb
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=petty+cash+advance+form+excel'. This URL is presented within the document body, disguised as a 'petty cash advance form excel', indicating a social engineering lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely to obscure the malicious redirector. No scripts were extracted from this sample.

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.ru/pify?keyword=petty+cash+advance+form+excel In PDF document text
    • http://files.knowledge.video/uploads/1/3/1/4/131406663/wonevofikopexugeja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1789/6089/files/sanunubixovoronixeviko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/61545433850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0357/4434/files/avast_free_license.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/tn_commercial_drivers_license_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/administrao_de_produo_livro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/public_policy_analysis_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/80492666879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/galatea_2._2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7673/8462/files/wonisewinebewemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2222/9397/files/pikerebemenomomag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4322/5751/files/95213020175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/zakukosutigijezujuzixovug.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D3 5232 bytes
SHA-256: 7c654b7a26ab7411e2f76f6743a794f913f4eed575685ddbbfb2e2e2f824f5eb
font_01_sfnt_off00007b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6D 9660 bytes
SHA-256: 383e2f8d853a657f12b04ebd0f8e75d874d68d8c95a4e3e9b699d64345e54ec9
font_02_sfnt_off00009c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C54 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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