Malicious PDF — malware analysis report

Static analysis result for SHA-256 13c778b2e089fe22…

MALICIOUS

PDF

41.6 KB Created: 2020-08-21 06:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2111f22e058b22d5ec603ec7f6447109 SHA-1: 3283c7083c8a8d239ac8fa1b0300b0bde874ce1b SHA-256: 13c778b2e089fe227dde01f097ab5d1d1301b629b73cb86877c4745d21d9435f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains a URL pointing to this malicious domain, suggesting an attempt to redirect the user. The presence of numerous other PDF links, many hosted on Shopify, 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/pify?keyword=sql+server+2017+enterprise+edition++free
    • http://files.missmillan.com/uploads/1/3/1/1/131164205/gegemesuposojo-moseke.pdf
    • http://feropovot.warlockwardrobe.com/uploads/1/3/2/6/132681579/8675078.pdf
    • http://lavozazif.bakemydayacadiana.com/uploads/1/3/0/8/130813848/1215356.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/6727/5424/files/gungeon_secret_rooms_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/7887/7337/files/timesavers_clock_parts.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/merebexepanivubatu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/poxenisewiziverubi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/alpha_male_strategies_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/bls_aha_2020_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0437/4629/5959/files/javascript_scientific_notation.pdf
    • https://cdn.shopify.com/s/files/1/0433/6487/6444/files/lowix.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6422/files/96260180409.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xixuvedivikeror.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000641e.bin
79f010796b05627cb07c86969780ecd7b331eefe1aa5b9f0f8a8b103282b83c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x641E 5520 bytes
font_01_sfnt_off0000770a.bin
e98c176428b26be8a6b21c1e3f32ef2c5fb3641afed9a4fd9e4dab7a200517b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x770A 10228 bytes