Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d6cc5b2739b0dc…

MALICIOUS

PDF

59.1 KB Created: 2020-08-24 17:39:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93c8f7eed847c686c2b61748c1cdcb7b SHA-1: a0ba177301660c83cb5d1e7f5bf408cd112b9985 SHA-256: 03d6cc5b2739b0dc7b074b11c4c9f86573ed1e5435fd01f6828a86506d8f35b6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=free+bulk+sms+software++for+pc'. This URL is presented within the document body, suggesting a lure to download or access something malicious. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute the malicious PDF. The ML classifier also strongly flagged this PDF as malicious.

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=free+bulk+sms+software++for+pc
    • http://files.mark-it-pink.com/uploads/1/3/1/4/131438571/vobakorage-xerex-gapabefanawosen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8200/7199/files/que_es_crowdsourcing.pdf
    • https://cdn.shopify.com/s/files/1/0433/1244/7652/files/excel_2010_bedingte_formatierung_ampel_datum.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/telolaxemifudogebug.pdf
    • https://cdn.shopify.com/s/files/1/0438/3296/7318/files/cfa_level_2_schweser_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/5943/0047/files/89524674019.pdf
    • https://cdn.shopify.com/s/files/1/0432/0693/4688/files/78343050657.pdf
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/bursar._umd._edu_differential_tuition_faq.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/9628898326.pdf
    • https://cdn.shopify.com/s/files/1/0439/2812/5595/files/ffmpeg_ubuntu_14._04.pdf
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/60643510711.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/yaseen_word.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000095d7.bin
705a40f2f1299da93398ac562f39fb8e280a7b0d058145836d6dafd55d8ad212		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95D7 6812 bytes
font_01_sfnt_off0000a70a.bin
606292f1d0d866bb8894e2ee3b7497542d6e53df249aabd9302ba502f378b940		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA70A 5412 bytes
font_02_sfnt_off0000b96e.bin
3fe353cf2b77935e20a83619a2c930d0a30aadc418f8ce8ebc44ccb3c1f025ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB96E 11016 bytes

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