Malicious PDF — malware analysis report

Static analysis result for SHA-256 405e1214376cf119…

MALICIOUS

PDF

36.5 KB Created: 2020-08-14 03:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f43b80c3c5a62b54cf33fc886766765 SHA-1: ee819b352a7c5e19be073dff7cfcd11209090699 SHA-256: 405e1214376cf119278ee67fc49540e354996c895f429e59cf84b92ac8af3c96
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=mcafee+antivirus+free++with+product+key', is designed to lure users into downloading potentially unwanted software or malware by impersonating a legitimate antivirus offer. The presence of a large number of external PDF links, many pointing to Shopify domains, suggests a link farm tactic to improve search engine ranking for malicious lures.

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=mcafee+antivirus+free++with+product+key
    • http://kevamanew.mrshuffreadingisfun.com/uploads/1/3/1/4/131452958/luzaxoxinusa.pdf
    • http://files.centerpointschool.org/uploads/1/3/1/0/131070137/zumurirofe_solelafipawo_nopokupi_bolilejidi.pdf
    • http://files.mistysaromaticboutique.com/uploads/1/3/0/9/130969731/vedilewusibegaguw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5004/files/right_triangle_trigonometry_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3013/files/sewing_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/3569/5016/files/pobaluxapotudi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0002/0635/files/fivoloserigajixobumi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4372/4186/files/chemdraw_ultra_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/mipufuruwunog.pdf
    • https://cdn.shopify.com/s/files/1/0438/7382/9032/files/im_missing_you_baby_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/7500/9696/files/braille_script.pdf
    • https://cdn.shopify.com/s/files/1/0437/0766/2504/files/social_anxiety_dsm_5_criteria.pdf
    • https://cdn.shopify.com/s/files/1/0438/0380/3808/files/ariana_grande_focus_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6846/files/65825799660.pdf
    • https://cdn.shopify.com/s/files/1/0433/7644/3543/files/vopogexirexiwefowarunesi.pdf
    • https://cdn.shopify.com/s/files/1/0436/5503/7078/files/54333109033.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43692268827.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050d6.bin
52b30dcf62bdf0f1aa2bc23647bdbec3aae2a76f083c9a6106b0bf6521d21428		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50D6 5536 bytes
font_01_sfnt_off000063bd.bin
e5f97f65ee844b65f1eea3f80cd7b7292e8614750557e4dc1631453bf32dd4d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BD 9684 bytes

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