Malicious PDF — malware analysis report

Static analysis result for SHA-256 040b0f377702365b…

MALICIOUS

PDF

45.6 KB Created: 2020-07-20 23:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 3aee6ec5efc324b9ec7eeefc14f2439f SHA-1: 1c6a8ff2fa357b2eb19eb26be455ec4bea318345 SHA-256: 040b0f377702365ba4151e8c4bc1648d078e091b7e1a1b5706a18272e8a2ded6
194 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its extensive use of SEO link farming techniques, directing users to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'bearing clearance chart pdf'. The presence of numerous links to external PDFs, many hosted on platforms like Shopify and WordPress, suggests an attempt to manipulate search engine results and drive traffic to malicious infrastructure. The primary malicious IOC is the redirector URL.

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/wb?keyword=bearing%20clearance%20chart%20pdf In PDF document text
    • http://files.staging.cornrowsandco.com/uploads/1/3/1/4/131438180/4d67afdbc51.pdfIn PDF document text
    • http://files.stjoseph-stpaul.com/uploads/1/3/0/7/130775950/8226148.pdfIn PDF document text
    • http://files.nworldweiqi.com/uploads/1/3/1/4/131453431/4578662.pdfIn PDF document text
    • http://files.johnbhenry.com/uploads/1/3/1/4/131483110/wosuxemok.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/1/0435/1026/8064/files/guwegiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4443/7144/files/91929604500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0456/7450/files/pozisowifoj.pdfIn PDF document text
    • https://bidaleb.files.wordpress.com/2020/06/88753637697.pdfIn PDF document text
    • https://tanebum.files.wordpress.com/2020/07/besim.pdfIn PDF document text
    • https://xusemoribeva.files.wordpress.com/2020/06/92001178183.pdfIn PDF document text
    • https://puxopumeget.files.wordpress.com/2020/06/12384384102.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/58391112398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/48589899301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/58823906320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/dilap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5887/2998/files/kimixonubuxogoxefak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9339/2536/files/marubuvimupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/62589354303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8988/7399/files/31800987204.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_off0000779b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x779B 4968 bytes
SHA-256: 13738a22e6387e2c2822ce88825a4899f94726d35bd4cb26ef07824b6f2abcd2
font_01_sfnt_off0000886f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x886F 9620 bytes
SHA-256: 64852298bd113c3677e6d40b59a316bc77041b027ad6f41d900f7d403668efdd

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