Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ad7762df6e2a84…

MALICIOUS

PDF

48.0 KB Created: 2020-08-24 05:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04cfe2fcf505ed77b8df35c4a20ee5e0 SHA-1: db24cfecc219e07128953694e63a421e754f330a SHA-256: e1ad7762df6e2a84bdff1e0d67c3d23e5babb3caae89e48f06964c168591ede1
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to shopify.com, but one critical link redirects to a known malicious infrastructure at ttraff.ru. The document body, though heavily obfuscated, contains the same keyword as the malicious URL, suggesting a lure to a phishing or scam page. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=membrane+structure+pogil+answers+phospholipids
    • http://zepin.awestar.org/uploads/1/3/2/6/132681862/lemem_kosetoj_zigifuzozajavi_wamefowemar.pdf
    • http://files.canterburycathedralquarter.co.uk/uploads/1/3/1/4/131453194/a606c.pdf
    • http://vufepeb.country-sass.com/uploads/1/3/0/8/130814124/f930be030153.pdf
    • https://cdn.shopify.com/s/files/1/0457/3754/1798/files/16714836307.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/85871157128.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/zalozanijowonaxifukifarin.pdf
    • https://cdn.shopify.com/s/files/1/0432/4615/7992/files/avena_quaker_manzana_canela_informacion_nutricional.pdf
    • https://cdn.shopify.com/s/files/1/0435/7645/9422/files/xebafojefala.pdf
    • https://cdn.shopify.com/s/files/1/0429/9459/8047/files/valotimakobekilu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45292738862.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/56421333376.pdf
    • https://cdn.shopify.com/s/files/1/0434/7812/2649/files/womufar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0437/8171/8173/files/gufuzuwezefibikexevur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078ce.bin
922c19200c87b0d71e979d1eb7a87801fcd83eacfc40aa3086cd20413244df43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78CE 5724 bytes
font_01_sfnt_off00008c24.bin
f457bf481022e91430d31a81d035293e88112af57fec73ae38a3bdae97a29c87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C24 11648 bytes

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