Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a45c6b0294fc2d…

MALICIOUS

PDF

82.2 KB Created: 2020-08-03 13:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4e5c8cb90d2b8b700fc6a8c16091b0e SHA-1: 5603f3a47b3eef7a8eabc8f76b2ab27ec2cf1419 SHA-256: 75a45c6b0294fc2deadeefbc06feecc5a37fd1e350265928c812b28ba7302511
152 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malicious content delivery attempt. The document body, though heavily obfuscated, contains the URL that triggered the heuristic. The presence of numerous external PDF links suggests a link farm or SEO poisoning 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.cc/wb?keyword=juliette%20novel%20marquis%20de%20sade%20pdf
    • http://files.makingscentsofsoy.com/uploads/1/3/0/7/130775828/weponaxula_zogedilusotox_paradusipagapud_luverumeteme.pdf
    • http://files.lakinkshrink.com/uploads/1/3/1/3/131380440/zanej-guxivukekol.pdf
    • http://files.antonellascafe.com/uploads/1/3/2/6/132695887/7582891.pdf
    • http://files.totalityauthenticlife.com/uploads/1/3/1/4/131408170/jedabixewom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23929268289.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/36922789974.pdf
    • https://cdn.shopify.com/s/files/1/0437/5812/5213/files/d_d_weapons_of_legacy.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/34205655541.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/67470494761.pdf
    • https://cdn.shopify.com/s/files/1/0446/7975/7977/files/trap_door_recipe_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/23869897890.pdf
    • https://cdn.shopify.com/s/files/1/0432/3544/2855/files/24494558551.pdf
    • https://cdn.shopify.com/s/files/1/0434/2307/2412/files/59857152894.pdf
    • https://cdn.shopify.com/s/files/1/0434/4761/5649/files/siskiyou_pass_road_conditions.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2564/files/74140604498.pdf
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/tokomexagesirawemibelawo.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_off000106e0.bin
b5f22a3d6ab40035873e63ec749e318a4f434f26a3fb317ed2e0388a907b8383
pdf-font-stream PDF embedded font (sfnt) at offset 0x106E0 5364 bytes
font_01_sfnt_off0001190b.bin
dfbd7ec363cfa372e52a26aa022a5b9e2afaa21413d4e1d358a35347d17630e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1190B 10120 bytes