Malicious PDF — malware analysis report

Static analysis result for SHA-256 33fbbf83af48fc5e…

MALICIOUS

PDF

41.3 KB Created: 2020-08-20 07:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2de03c9c561c54d3604b6089caef5c5 SHA-1: decdb33e88bd21d80af7cc089bcace7c9ab85356 SHA-256: 33fbbf83af48fc5eca0f5c2a50d31f6caf6b2e4905dd3a37dc66e2700c3bdce6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=amiga+informatics+pvt.+ltd+gurgaon', is likely used to redirect users to further malicious content. The ML classifier also strongly indicated maliciousness, supporting the assessment of a phishing or SEO spam 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=amiga+informatics+pvt.+ltd+gurgaon
    • http://bosife.lilyenvironmental.com/uploads/1/3/1/3/131379935/dibifizonitilel_jakasere_sejozi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/0464/9884/files/64268652515.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/14373048997.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zetelonum.pdf
    • https://cdn.shopify.com/s/files/1/0428/3092/1894/files/8916760520.pdf
    • https://cdn.shopify.com/s/files/1/0431/5673/4109/files/4786309102.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9379/files/lorimelimuzupunitu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/64667291573.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/fox_soccer_plus.pdf
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/fenugilok.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/2005_vw_passat_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6582/files/32168901782.pdf
    • https://cdn.shopify.com/s/files/1/0444/3491/5495/files/ardhanari_tamil_movie.pdf
    • https://cdn.shopify.com/s/files/1/0437/3859/5482/files/xagojoxoparibub.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_off000055fc.bin
c0c3fc44c51c71feb977b240848d3280f6baf489c85a2af7b7867dc6ea86ba1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55FC 5320 bytes
font_01_sfnt_off000067f8.bin
6e2559773bac7bee1d94ccaf72b0f3f7523b0ce0c78857bf93358525b2c7abab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F8 9944 bytes
font_02_sfnt_off000089f4.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89F4 4324 bytes

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