Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a78390dde60bac…

MALICIOUS

PDF

34.0 KB Created: 2020-08-13 22:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc08c85ac198e3d7ac49eada56b51843 SHA-1: 88b876b43e65be0fbc15421f8453c353721c38a0 SHA-256: 72a78390dde60bac230defdd0ef6d8ee85aca3a31e9dcd6a481f3a6cb3a951ba
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=step+aerobic+platform+ebay'. Another heuristic indicates a link to an algorithmically-generated URL, 'http://files.everythingipromisedyouisbeingsold.com/uploads/1/3/1/6/131607544/e9bb6e4ddfe2ef.pdf', which is likely part of a link farm. The ML classifier also strongly flagged this PDF as malicious. These findings suggest the document is designed to redirect users to malicious sites, potentially for phishing or malware delivery.

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.cc/pify?keyword=step+aerobic+platform+ebay
    • http://files.nikkilmoore.com/uploads/1/3/0/8/130873921/c31fb860094.pdf
    • http://files.everythingipromisedyouisbeingsold.com/uploads/1/3/1/6/131607544/e9bb6e4ddfe2ef.pdf
    • http://files.professorsilverblank.com/uploads/1/3/1/3/131381363/gutad-nusomavakajawu.pdf
    • http://files.sarahclariusphotography.com/uploads/1/3/1/1/131164236/defikakad-kixuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/the_secret_of_monkey_island.pdf
    • https://cdn.shopify.com/s/files/1/0432/4543/7083/files/37320644953.pdf
    • https://cdn.shopify.com/s/files/1/0437/5930/4858/files/86487630546.pdf
    • https://cdn.shopify.com/s/files/1/0452/6351/9906/files/akuntansi_biaya_buku.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0729/files/98167406340.pdf
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/65440909893.pdf
    • https://cdn.shopify.com/s/files/1/0434/0603/3052/files/ordo_alismatales.pdf
    • https://cdn.shopify.com/s/files/1/0448/0362/1025/files/anime_drawing_books_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0438/7107/6520/files/numuna.pdf
    • https://cdn.shopify.com/s/files/1/0431/0525/5586/files/adobe_illustrator_create_editable.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_off0000488d.bin
0084d1e376bc871dc30675e7306f9a3c1c842ebf476d21ac43c53bacea04c005		 pdf-font-stream PDF embedded font (sfnt) at offset 0x488D 5328 bytes
font_01_sfnt_off00005a9a.bin
cc02f76e7eb00fd179987ba41fcd2338b1bd3715ac8bd6d33955db4eb607c8b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9A 9564 bytes

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