Malicious PDF — malware analysis report

Static analysis result for SHA-256 22cceb11bddc060b…

MALICIOUS

PDF

44.0 KB Created: 2020-09-01 02:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e612fd6e3761fb0ee1a8b3b6f051206 SHA-1: 9cefe43833a45cd812e7a8f27e965de54e2a0bdf SHA-256: 22cceb11bddc060b7fbca1529eb5bd1a215f2cc535709747afc194c3e5488192
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at ttraff.ru. The document body, though heavily obfuscated, contains text related to 'Excel cash book template with gst' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning tactic.

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.ru/wix?keyword=excel+cash+book+template+with+gst
    • https://cdn.shopify.com/s/files/1/0428/3010/2694/files/ketogenic_diet_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/winobefipeterajulemubeti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nofalefupipalivudekim.pdf
    • https://static.usrfiles.com/ugd/912de2_396ecc3ee4f3478e800291d915a882a5.pdf
    • https://static.usrfiles.com/ugd/238140_afa62c5f666c4f1eb44e7c60dbc94895.pdf
    • https://static.usrfiles.com/ugd/a4e402_364b74c4f94c4f39b65e0d1f42224ad2.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_381a9b7e87e8485998ce0bc613dc7b28.pdf
    • https://cdn.shopify.com/s/files/1/0432/6208/3232/files/sazexetimenujawot.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/40410283435.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/dobojomam.pdf
    • https://cdn.shopify.com/s/files/1/0440/5175/9269/files/behringer_x32_digital_mixer.pdf
    • https://cdn.shopify.com/s/files/1/0436/0480/3741/files/befindisa_script_font.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_off00006cbc.bin
5b493b9d2305e840e592240e719d2fbc6d416fa130172a3a387eb1211d0c1bdc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBC 5572 bytes
font_01_sfnt_off00007fa9.bin
2dc1f0f7bfe2a7879bbfb1a5d451e2b3fc8fcf1533864b39765793767189666b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA9 10404 bytes