Malicious PDF — malware analysis report

Static analysis result for SHA-256 832787181b87c5ba…

MALICIOUS

PDF

62.6 KB Created: 2020-08-06 15:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0146289d4f48b22962cc693dacae80ec SHA-1: d03d7b6d0a7761b7c58e74487cb87788c160a38c SHA-256: 832787181b87c5ba50d8de8fb7d26e7d4fd337c52c14163f7532ee9b3b297dde
154 Risk Score

Malware Insights

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

The PDF contains a prominent link to a redirector URL, identified as malicious. The document body, though heavily obfuscated, also contains the same URL, suggesting an attempt to trick users into visiting a potentially harmful site. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. No scripts were extracted from this sample.

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=how+to+use+japanese+abacus+pdf
    • http://files.aliciagalindo.com/uploads/1/3/0/9/130969190/molomoputi.pdf
    • http://files.ruthierosephotography.com/uploads/1/3/1/6/131606405/ec2d5e9608ea.pdf
    • http://files.ashlynnsboutique.com/uploads/1/3/0/7/130739340/d87cff3.pdf
    • http://files.kmarksconsulting.com/uploads/1/3/0/9/130969237/kivuke-nomilewo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/attestation_de_salaire_cnss.pdf
    • https://cdn.shopify.com/s/files/1/0432/9452/3552/files/wow_classic_hunter_pre_raid_bis.pdf
    • https://cdn.shopify.com/s/files/1/0436/5264/5017/files/nesesa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/49662401561.pdf
    • https://cdn.shopify.com/s/files/1/0437/8607/6309/files/41485598116.pdf
    • https://cdn.shopify.com/s/files/1/0430/1373/4563/files/git_change_commit_author.pdf
    • https://cdn.shopify.com/s/files/1/0434/6275/4461/files/skate_3_cheats_codes_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3767/files/new_vegas_ultimate_mod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/41516919033.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9741/files/html_embed_from_url.pdf
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/vuximogeloxorir.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/38744252719.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/90190553523.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000889e.bin
351cd9327ecffa841cf3e0c9ecefe85e8bed75d54adf39b7ffb816dc4490249a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x889E 10064 bytes
font_01_sfnt_off0000aa57.bin
bf39cb1701e222d908802206c9c266b3bcfbce8e67198a62cb92e314b4a9508e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA57 5124 bytes
font_02_sfnt_off0000bbe3.bin
fc80ffcb149424b3a14fd7970a8f71165528e886730c3eb9f4f68a7074c2c264		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE3 10104 bytes
font_03_sfnt_off0000de79.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE79 4324 bytes

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