Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0294cea69ec729…

MALICIOUS

PDF

41.6 KB Created: 2020-08-12 10:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b65dfadb1742b415136d191973da00d SHA-1: 7f7ddc9fa6a9e6f42a243172e90ea7b16236c190 SHA-256: 6c0294cea69ec729ad8949f1b02aa5305f78027681a46c25b028efe2c1f2b94d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of external links, many of which point to potentially malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=nuts+and+bolts+types+pdf, which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, also contains this URL and numerous other PDF links, suggesting a link farm or SEO poisoning tactic.

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=nuts+and+bolts+types+pdf
    • http://files.mariecharpentier.net/uploads/1/3/1/4/131483019/batipaxadas.pdf
    • http://files.heatherdawnbatchelor.com/uploads/1/3/1/4/131407148/wavirureluzikus_karofa.pdf
    • http://files.peppersrestaurant.ie/uploads/1/3/1/1/131163872/6441877.pdf
    • http://files.loggerhockey.com/uploads/1/3/1/3/131379256/9567447.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/3353/2315/files/order_domain_cleric.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/87452632448.pdf
    • https://cdn.shopify.com/s/files/1/0437/8509/3272/files/xefogakubeladifogutud.pdf
    • https://cdn.shopify.com/s/files/1/0435/8012/9441/files/filewilopomigirane.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/exercice_cercle_trigonomtrique_seconde.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/domagetozozavugaro.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5303/files/ncert_exemplar_book_class_11_biology.pdf
    • https://cdn.shopify.com/s/files/1/0434/6413/0725/files/27722383827.pdf
    • https://cdn.shopify.com/s/files/1/0432/5382/5704/files/make_page_size_smaller.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.pdf
    • https://cdn.shopify.com/s/files/1/0430/1930/5113/files/canterbury_tales_prologue_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0314/files/currency_exchange_live.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3988/files/werakisavavufifedejalu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064df.bin
8aa310849858ecc04cfb2f93897030bf3773bcaf34667712947b3225cc420b0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DF 5152 bytes
font_01_sfnt_off0000767b.bin
252181572a9f3eef78fcd13d2370eec7ee074644acda0bdd34321124af0b073d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x767B 10188 bytes

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