Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0582a7971d5249…

MALICIOUS

PDF

43.5 KB Created: 2020-08-17 15:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: febde12893ab5d53a71fc9106adc5ce9 SHA-1: c928297775c0baf0b9658c3ffdf4e28745f6bb54 SHA-256: 7e0582a7971d524951dd90e9a1e5c75770986aa89bfff77e625dbad493c260c3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://ttraff.ru/pify?keyword=capricorn+woman+scorpio+man+yahoo+answers', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify links, reinforcing the idea that the document's primary purpose is to lure users to potentially malicious sites.

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.ru/pify?keyword=capricorn+woman+scorpio+man+yahoo+answers
    • http://files.eds.company/uploads/1/3/0/7/130739404/vomuzulapudirewit.pdf
    • http://votemug.uofurugby.org/uploads/1/3/1/1/131163601/6400712.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/xetigugolagofov.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/56195045941.pdf
    • https://cdn.shopify.com/s/files/1/0439/4015/1454/files/najapodukevav.pdf
    • https://cdn.shopify.com/s/files/1/0451/9510/0311/files/agnieszka_szulim_piotr_woniak_starak.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/zazidagenidewuno.pdf
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/lonixivupelukugom.pdf
    • https://cdn.shopify.com/s/files/1/0432/8577/4491/files/79385917416.pdf
    • https://cdn.shopify.com/s/files/1/0432/8918/2376/files/64410864814.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/autobahnkarte_europa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/79892277133.pdf
    • https://cdn.shopify.com/s/files/1/0439/7439/4014/files/sybex_cissp_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d40.bin
1784aecb7344f5d1648a10c835c92f3bd12551fdf8499c89498b25b109addb1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D40 5068 bytes
font_01_sfnt_off00006e53.bin
7d38c3ed6b500428df1cce09f2ff500e52b680c54398750abe068864bf288413		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E53 11000 bytes
font_02_sfnt_off000092f0.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92F0 4324 bytes

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