Malicious PDF — malware analysis report

Static analysis result for SHA-256 098e3193c937eecb…

MALICIOUS

PDF

42.6 KB Created: 2020-08-14 18:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 634018d9c132005f880606f19a4b9582 SHA-1: 194fee1cf9c1c7948ce6f458304c99564af37512 SHA-256: 098e3193c937eecbac4841127cc414bf575f6a9d79bb00bdb2116e870a6ff390
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 identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector identified by the heuristic. The presence of a large number of external PDF links suggests a link farm or SEO poisoning attempt, likely to obscure the malicious redirector.

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=ethics+game+merger+madness+answers
    • http://faxukape.yachtavailability.com/uploads/1/3/0/7/130775376/nesoxok.pdf
    • http://files.thehapi.studio/uploads/1/3/2/6/132681749/3340298.pdf
    • http://files.impactsupphut.com/uploads/1/3/0/7/130776420/1169071.pdf
    • http://files.flyawaygymnastics.com.au/uploads/1/3/2/6/132681971/kijonojutiv_mikukaburewonat.pdf
    • http://files.numpucsh.com/uploads/1/3/1/8/131856491/welexedifadubidisa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1268/5977/files/calculus_briggs_cochran_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/65576371098.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/33950075704.pdf
    • https://cdn.shopify.com/s/files/1/0432/3069/1496/files/banduk_ki_game.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/kefejaxogekegeletupa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6002/files/black_rider_persona_5.pdf
    • https://cdn.shopify.com/s/files/1/0443/9543/0054/files/xawuwukare.pdf
    • https://cdn.shopify.com/s/files/1/0451/1324/5848/files/graphic_designer_portfolio_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/kipawabel.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4008/files/bhagavad_gita_slokas_with_meaning_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8242/files/difference_between_induction_motor_and_synchronous_motor_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peregomosurexezobosezob.pdf
    • https://cdn.shopify.com/s/files/1/0447/1301/7500/files/49353902278.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_off00006878.bin
ed90b4670838a1eb4bb4e3ed6dcf6884cb01af088e0b509aacc1198fa5a5c935		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6878 5368 bytes
font_01_sfnt_off00007aa1.bin
c6a0c14c12aba9294b59a15bdc4f18c2f032c252f3171ea110866b3898b71ec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA1 10240 bytes

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