Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c116b507e602e0…

MALICIOUS

PDF

45.4 KB Created: 2020-08-03 12:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de6a103af4c4e88e1901309b5c673aed SHA-1: 22473e38c8a6cf9e8c649200e367d1a376962183 SHA-256: 00c116b507e602e02bfb57de3849dcfb2b521ba2c6b30644717deab4aa49da27
194 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with a malicious link. The primary malicious URL identified is https://ttraff.com/pify?keyword=choke+em+out+pdf, which is a known redirector. The document also hosts a large number of other PDF files, likely for SEO poisoning or link farming, with the primary malicious link being the most concerning.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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=choke+em+out+pdf
    • http://files.sareslater.com/uploads/1/3/2/6/132695568/busazazoxup_retavi_bubab.pdf
    • http://files.wirraparinga.com/uploads/1/3/1/3/131380175/8233607.pdf
    • http://files.latifyahia.net/uploads/1/3/2/6/132682076/rofiba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/9257/3336/files/340352495.pdf
    • https://cdn.shopify.com/s/files/1/0434/0816/2981/files/datewagigimososemige.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/gbatemp_wii_u.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6647/files/walmart._capitalone._com_activate_l-_7683.pdf
    • https://cdn.shopify.com/s/files/1/0435/4991/7347/files/vikamujinawos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98629167596.pdf
    • https://cdn.shopify.com/s/files/1/0438/1927/0306/files/14889843114.pdf
    • https://cdn.shopify.com/s/files/1/0436/4442/0246/files/26835786381.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/kakozeta.pdf
    • https://cdn.shopify.com/s/files/1/0437/9272/8226/files/80547808324.pdf
    • https://cdn.shopify.com/s/files/1/0437/6782/4533/files/42046797356.pdf
    • https://cdn.shopify.com/s/files/1/0439/3785/7691/files/duwutexumanumuponotonetu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3397/7247/files/67749573444.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/zipexulafa.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_off00006686.bin
e90e1806a7dc001361531cbdc3fb8b4a43047651050637decda3cc240fd2cf22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6686 4580 bytes
font_01_sfnt_off0000762c.bin
f82f600177d81bd1c6a3504b80972eb259753a4b1d4e23ef5232e94f8d400431		 pdf-font-stream PDF embedded font (sfnt) at offset 0x762C 10608 bytes
font_02_sfnt_off00009a7d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7D 4324 bytes

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