Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f9c7f6d63ea8a0…

MALICIOUS

PDF

73.7 KB Created: 2020-08-08 19:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d274065524d2f9701448c5a115f62be9 SHA-1: e17eb3d90efcfad6f9ab59348d73f1087d5b8959 SHA-256: 94f9c7f6d63ea8a08fca26d4c61090d0e37366d3902e6ed2ef995ef45a833614
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The PDF also hosts a large number of external links, many to Shopify, which is indicative of a link farm used for SEO poisoning or to obscure the final malicious destination.

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=wernicke+s+encephalopathy+pdf
    • http://files.endgamefit.com/uploads/1/3/0/8/130814132/c9d79ae5a.pdf
    • http://difata.afinoentertainment.com/uploads/1/3/2/6/132696194/jalalodo_navenobotag_fewaf_xusisiboxikewu.pdf
    • http://files.lms-art.co.uk/uploads/1/3/2/3/132303219/ce2c143.pdf
    • http://files.seasidejewellery.com/uploads/1/3/2/7/132740498/2055416.pdf
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/zigibejibozolemepexi.pdf
    • https://cdn.shopify.com/s/files/1/0438/7612/2779/files/bodybuilding_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52244446143.pdf
    • https://cdn.shopify.com/s/files/1/0429/7120/1695/files/80509903322.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3406/files/wikazebudumotupo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/git_no_such_remote_origin.pdf
    • https://cdn.shopify.com/s/files/1/0432/5533/3027/files/bugurakaluri.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/99531696624.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2085/files/animation-_fill-_mode.pdf
    • https://cdn.shopify.com/s/files/1/0433/8765/0211/files/2005_ford_f150_repair_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0452/3737/1037/files/another_day_of_sun_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/9866/7163/files/aggression_and_violence.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c022.bin
8ab9fb97bc96693e8853e3cc945dfab69b6be4d6ac0caaff99ce970df740307f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC022 10440 bytes
font_01_sfnt_off0000e2c3.bin
79b9cea25cece6e99ba9ca81fd6cea56b82ffd41842c8fca513b51a8236b9a83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C3 5420 bytes
font_02_sfnt_off0000f548.bin
8502002737b529bbda6869f9dcd29c17941a9956a6bfc7212b062423b57f6d46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 10644 bytes

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