Malicious PDF — malware analysis report

Static analysis result for SHA-256 158dd64419fbd3d9…

MALICIOUS

PDF

57.4 KB Created: 2020-08-31 22:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3047dd31f4700985ce8b8b5c81174596 SHA-1: 8d31f2649e443b9076956ea092385bb014d9ae42 SHA-256: 158dd64419fbd3d975070e528b6c4c731344ec849b7581d73c8656bf66064da2
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into visiting a potentially harmful site. The presence of numerous other PDF links, many benign, indicates a link farm strategy, likely to obscure the 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/wix?keyword=react+template+dashboard+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/eaf48f_f767dc899459425fbba812986b6f4791.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca891cb0177c40eb92f6f33a77dfeb04.pdf
    • https://static.usrfiles.com/ugd/3b0c81_71a77ecb6b9f4620a6c26feda3d867e1.pdf
    • https://cdn.shopify.com/s/files/1/0439/1718/1083/files/80_bpm_acapella.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/vosagukemiti.pdf
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/6372896241.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7182/files/sokonigexip.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6551/files/11428934735.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0358/files/lire_journal_el_khabar.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/51247160220.pdf
    • https://cdn.shopify.com/s/files/1/0435/1351/2100/files/my_singing_monsters_breeding_chart.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/oxford_picture_power_dictionary.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000960b.bin
66ad0ae9bcf3faa69e2243e22f60ba2700aa20a9974a85921c822942c1bfb57f
pdf-font-stream PDF embedded font (sfnt) at offset 0x960B 5176 bytes
font_01_sfnt_off0000a7a1.bin
d855ccc56cf556b344c7b1f9de904e81be13460ea6ccb3533159745c593413c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7A1 10068 bytes
font_02_sfnt_off0000ca28.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA28 4324 bytes