Malicious PDF — malware analysis report

Static analysis result for SHA-256 0281adf92cd49700…

MALICIOUS

PDF

43.2 KB Created: 2020-08-22 18:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cfc5081e4332803317adc49e40c7d30 SHA-1: 1d14fcd30dec08f8007cc0716ab8fb4c47aed04d SHA-256: 0281adf92cd49700497f5c90d1c5df5bc158bab82f9d5bba0bb1be76b44c3725
194 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified links to known malicious redirector infrastructure, specifically 'ttraff.com', which is used to obscure the final destination. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.com/pify?keyword=mobile+marketing+association+guidelines
    • http://files.lifegolf.net/uploads/1/3/0/8/130814909/sagojituvomejufu.pdf
    • http://dapefa.utahstudentnurse.org/uploads/1/3/1/4/131438304/vezoziwofu-nobizobenofusu.pdf
    • http://rujelupab.parentmanagementtraininginstitute.com/uploads/1/3/0/8/130814238/5594668.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/jolat.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/lilikotebipakixeji.pdf
    • https://cdn.shopify.com/s/files/1/0432/1204/6495/files/spectral_waveform_common_carotid_artery.pdf
    • https://cdn.shopify.com/s/files/1/0436/9226/1529/files/fraktur_basis_cranii_anterior.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/tovolilunusixifegif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zonixalekena.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/80830988574.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/91474031353.pdf
    • https://cdn.shopify.com/s/files/1/0440/8823/0053/files/77042895604.pdf
    • https://cdn.shopify.com/s/files/1/0433/7565/7125/files/vilibalidar.pdf
    • https://cdn.shopify.com/s/files/1/0434/7058/6016/files/toravapode.pdf
    • https://cdn.shopify.com/s/files/1/0428/0880/3495/files/panobolorimemilowoxadidur.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/wow_classic_silk_bag.pdf
    • https://cdn.shopify.com/s/files/1/0431/6879/2732/files/80276665984.pdf
    • https://cdn.shopify.com/s/files/1/0450/0806/0574/files/farmacos_antiarritmicos_clasificacion.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_off00006b01.bin
90542bb3469723fd57a188200b2e8acda9b382e8cc15a6054413e24176f4e96a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B01 5468 bytes
font_01_sfnt_off00007d7c.bin
4b9c426511a8d981ba93c93880fcd0d873484dfaeffd8d5bd41315875e66130f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7C 9908 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.