Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e00a45ccf4e077…

MALICIOUS

PDF

46.1 KB Created: 2020-08-17 13:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c01cc366cfbe2f8f8bd83cbb69a8a239 SHA-1: 50df9f641df85ce56dbab3e156ce1a9b0bda8c38 SHA-256: 28e00a45ccf4e077a454df9379a8f9e950014699f8a5925406a0902c88c045d0
150 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 part of a link farm designed to distribute malware. The document body, though heavily obfuscated, contains the string 'Buried town apk mod' and the malicious URL, suggesting a lure to download potentially unwanted or malicious software. The PDF structure itself indicates a large number of embedded links, further supporting the link farm heuristic.

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=buried+town+apk+mod
    • http://zedifakun.multinationalmemphis.org/uploads/1/3/0/8/130813765/c36496cbcf.pdf
    • http://files.sports800.com/uploads/1/3/0/9/130969386/7109829.pdf
    • http://files.chinoyouthmuseum.com/uploads/1/3/2/8/132814302/dogemixegilufas-bofipuxam-zitamubelokarut.pdf
    • https://cdn.shopify.com/s/files/1/0432/5166/3012/files/77950108929.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/wizopa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6853/files/xotogurebetos.pdf
    • https://cdn.shopify.com/s/files/1/0428/8253/1481/files/newimajafusoduru.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5085/files/unir_archivos_online_sin_limite.pdf
    • https://cdn.shopify.com/s/files/1/0435/2419/4468/files/retotikanavoxewazapixa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8847/files/sandhyavandanam_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/9650/6521/files/boanstvena_komedija_pakao.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/96010376921.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/soreretoxolilijolare.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/54927869565.pdf
    • https://cdn.shopify.com/s/files/1/0435/8999/2605/files/74443722044.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068a3.bin
1be4d9998b8e260d7620e8f359ffef80c00a347e1f5004f2c43b91de0f4543ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x68A3 4984 bytes
font_01_sfnt_off0000798b.bin
165d9218b56baec048cd03fba540e0f993fe48f42e884256fdf2bc9f54e30d4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x798B 10672 bytes
font_02_sfnt_off00009dd0.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD0 4324 bytes