Malicious PDF — malware analysis report

Static analysis result for SHA-256 8feda040f6728b3b…

MALICIOUS

PDF

38.8 KB Created: 2020-09-01 05:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12cbdd7c9feba2b7f4aa8486ef5894e1 SHA-1: 81226e8dc37c52ca178de06bcad3445e274a1a17 SHA-256: 8feda040f6728b3b248e4154e818b2178a54819e5d654b95e601626e886ed020
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a download for 'cheat engine 6.4 windows 10'. The document also contains a large number of links to other PDFs hosted on cdn.shopify.com, likely as part of an SEO spam campaign to improve search engine ranking for malicious content. The ML classifier strongly flagged this PDF as malicious.

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=cheat+engine+6.+4++windows+10
    • https://cdn.shopify.com/s/files/1/0437/4872/0789/files/english_vocabulary_for_speaking.pdf
    • https://cdn.shopify.com/s/files/1/0439/1138/1147/files/pentatonix_cant_hold_us_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/xoxeketosexofaxefuwomu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/86641434.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/bosch_serie_4_varioperfect_manual_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/washington_dc_metro_map.pdf
    • https://cdn.shopify.com/s/files/1/0434/0259/2410/files/xezimoxibibasukobef.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_8382af58fe8d49f797bc0a55a857b580.pdf
    • https://static.usrfiles.com/ugd/8c0e65_42e64269234c4a53b3c972fef1fc81c9.pdf
    • https://cdn.shopify.com/s/files/1/0435/0948/1624/files/4019861279.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/rakave.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_off00005889.bin
4871fac2f1adbb7912d5e81ad52bfee63d5c52c2b889797ec56abf314a2266a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5889 5424 bytes
font_01_sfnt_off00006b1a.bin
5b49055a580dc8b9986cd2730e32e14e8f8a0c0bcacfec020fbd93a393098e01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1A 10668 bytes

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