Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9f57a65bbcb159…

MALICIOUS

PDF

33.3 KB Created: 2020-08-24 06:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68c37540c500ab4a375d4b9c73187f34 SHA-1: f7f39437494914f0210d34fa4e8c848c84cfecbd SHA-256: 0e9f57a65bbcb159d675a08b42f0a7d805011a14b7d30cc94bf36ae261af0e9b
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a "Binks hvlp spray gun manual". The ML classifier also strongly flagged this PDF as malicious. The presence of numerous external links, many pointing to Shopify domains, suggests a link farm or SEO manipulation tactic to distribute malicious content.

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.com/pify?keyword=binks+hvlp+spray+gun+manual
    • http://files.mkwritingsolutions.co.uk/uploads/1/3/1/6/131606390/kizozawela_vogeb_wujadelow.pdf
    • http://wapakanax.mk-bricks.ca/uploads/1/3/0/8/130814328/gejoxijakuxila_zetitusoz.pdf
    • http://wusobed.patientmind.org/uploads/1/3/1/6/131606739/rapusivalere.pdf
    • http://xivovum.triplecrownlacrosse.com/uploads/1/3/1/4/131453558/detax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4947/6518/files/6389993887.pdf
    • https://cdn.shopify.com/s/files/1/0428/9521/2697/files/free_old_arcade_games_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/git_setup_mergetool.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/3345257190.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/toyota_corolla_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/kekaximusuwazaz.pdf
    • https://cdn.shopify.com/s/files/1/0439/3402/3848/files/aspen_hysys_dynamics.pdf
    • https://cdn.shopify.com/s/files/1/0434/4460/0999/files/quarters_korean_bbq.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/vakime.pdf
    • https://cdn.shopify.com/s/files/1/0431/6984/1301/files/convert_file_sang_file_nh_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/5963/2545/files/16509184306.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_off00004405.bin
c1e0c1ac32ed44b146d59de7032da10386beec04380c4bbbe2e056cce8b6a7f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4405 5508 bytes
font_01_sfnt_off00005699.bin
553894bd858b08a512552b890c85f76033738f6f93e9b0a3907e4e46e3784649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5699 9848 bytes

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