Malicious PDF — malware analysis report

Static analysis result for SHA-256 268b59b2c253408d…

MALICIOUS

PDF

39.9 KB Created: 2020-08-10 21:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30fba87cb07a3d92eec09a58da8ab238 SHA-1: 634c742fc608fa8e270c051fe6a0ceabd1d5e1f8 SHA-256: 268b59b2c253408ddf46e56ac465a48953f492e85ef3ff4ab349fb9897df76b3
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary URL pointing to a redirector service (ttraff.cc). This suggests a link farm or redirection tactic to obscure the ultimate malicious destination. The ML classifier strongly indicated maliciousness, and the presence of numerous external links, including a redirector, supports this assessment. No scripts were extracted, and the document body is heavily obfuscated.

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/pify?keyword=alain+touraine+podremos+vivir+juntos+pdf
    • http://files.ashlandfiredept.com/uploads/1/3/1/3/131380354/mudobuve.pdf
    • http://wozitomes.nfctigers.com/uploads/1/3/1/0/131070161/542c9fcf527014.pdf
    • http://files.ellensorganicgarden.com/uploads/1/3/0/7/130740213/xefezupuzoxo-lobefufiwibali-zatofow-mudofeguzix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9167/3763/files/pathways_2_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0437/6946/2935/files/belkin_n10117_driver.pdf
    • https://cdn.shopify.com/s/files/1/0430/9942/2881/files/texujamuruwanoluwepol.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/1001597739.pdf
    • https://cdn.shopify.com/s/files/1/0432/0962/1665/files/rugademe.pdf
    • https://cdn.shopify.com/s/files/1/0438/0000/2717/files/attestation_sur_l_honneur_990i_cardif.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/vavipezuzuluxifi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/97680419299.pdf
    • https://cdn.shopify.com/s/files/1/0433/0265/0014/files/mexogudosavika.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/62114375677.pdf
    • https://cdn.shopify.com/s/files/1/0434/0806/4677/files/psychrometric_chart_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1272/files/85107796428.pdf
    • https://cdn.shopify.com/s/files/1/0448/6260/3426/files/39382143340.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_off00005bc0.bin
bfa91836fd1de35577284b481c45131a0947a5428c8e0dc2166a0990578cf77f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC0 5312 bytes
font_01_sfnt_off00006dc5.bin
afd8800f08437f28006c41e31215ee42156e07ae027db42155932774d5d99136
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC5 11336 bytes