Malicious PDF — malware analysis report

Static analysis result for SHA-256 0306a0677acf0cb9…

MALICIOUS

PDF

53.3 KB Created: 2020-08-07 13:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84b6d5d26c82e12dd6381382da1cc242 SHA-1: 2b791321927dbe41b4ad31576db3da1f8fb976ae SHA-256: 0306a0677acf0cb9b1836caca19800acb3acc6fe19b5eab1fb1aac107a67fbdc
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. The presence of a malicious redirector URL points towards a phishing or SEO scam attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=rack+and+pinion+steering+system+report+pdf
    • http://files.poloprague.com/uploads/1/3/1/6/131636916/9643090.pdf
    • http://files.impactwashtenaw.com/uploads/1/3/1/3/131379792/vovudugo_jubadife_kitomizovib.pdf
    • http://files.cardiffcrusaders.org/uploads/1/3/1/6/131606027/1401601.pdf
    • http://files.heritagelanechiropractic.com/uploads/1/3/1/8/131872273/zekik_bapuselibufutet_wugomo_gatotitubojovu.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/53984352299.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/55685812175.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/82197791859.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/39629120781.pdf
    • https://cdn.shopify.com/s/files/1/0437/5032/6426/files/rujafazokuvujinuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/sujomosugamorox.pdf
    • https://cdn.shopify.com/s/files/1/0438/4296/1570/files/history_of_badminton_rules_and_regulations.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/tabefo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/71791445369.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/74067972569.pdf
    • https://cdn.shopify.com/s/files/1/0440/3943/8486/files/jobigutef.pdf
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/16683948064.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/digozuraz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cf8.bin
32641fe0815b581945fed1de7ff32f6d8232b9cb60f34c4551b662361d97937c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF8 1720 bytes
font_01_sfnt_off0000856b.bin
69a6352e17233ddfde0b1e1c3dc1ffbcd5ae4b2b2a453409ed51f2594ff7bc49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x856B 5404 bytes
font_02_sfnt_off000097bc.bin
ca7507633ea467a659897a3381707eb94affcdb71cef19b71b17a2325cd99883		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97BC 9872 bytes
font_03_sfnt_off0000b961.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB961 4324 bytes

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