Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c31fb741320df5…

MALICIOUS

PDF

46.2 KB Created: 2020-08-08 18:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 10a4cd6e4566d590b356156665e23a56 SHA-1: 88be0e83db4e1f4fc74a69f32ef128e9f80977d5 SHA-256: 40c31fb741320df5d085fc06ef16c3197fce7d4d73e9127a8344db76b5314b29
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with the primary malicious link identified as a redirector. The document body, though partially corrupted, includes the malicious URL and references to other PDFs hosted on Shopify, suggesting a link farm strategy. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to lure users to malicious sites.

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/wb?keyword=mick%20foley%20have%20a%20nice%20day%20pdf In PDF document text
    • http://vawisam.bemispa.com/uploads/1/3/0/7/130776661/jomobova-latutuzafile-fimimitok.pdfIn PDF document text
    • http://files.sustainablesubstrates.com/uploads/1/3/1/4/131408024/a59272d44.pdfIn PDF document text
    • http://files.tucson3gun.com/uploads/1/3/1/8/131856519/vozat_meminupoduxukav_zuvak.pdfIn PDF document text
    • http://files.afdpc.org/uploads/1/3/1/4/131483440/gugog.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/1/0446/1376/3235/files/anti_inflammatory_herbs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/41385801877.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2670/9665/files/bolibomutolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6477/1238/files/sofatalawagamumujux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4675/6774/files/capteur_ultrason_hc_sr04.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4488/7963/files/74927473328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2047/4779/files/betacaroteno_beneficios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/carnatic_flute_tutorials.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/9756118714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3823/4008/files/rewexoxomojeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4107173541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30072581460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/91903287854.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 4

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_off00007744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7744 5200 bytes
SHA-256: a70b6b1fccb10065c89bd9bf793c998cf4077700d065fcd74f05b49bcffea507
font_01_sfnt_off0000891b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x891B 10176 bytes
SHA-256: 298c0c2b40f22f4c8dbb222694d93e236db2fc5da1f88edd647ede6d6ad53e77

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