Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cfb216c9bb7ad8d…

MALICIOUS

PDF

48.1 KB Created: 2020-08-25 14:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b8bb5b0f3bf4511a88c8354f1759c96 SHA-1: c87b4278993f03628110f0cb5195c0282ed6eea7 SHA-256: 8cfb216c9bb7ad8d025472996d6135780fdb795e819605f35a572fea543c4652
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to a 'minimalist lifestyle guide' and also includes the malicious URL, suggesting a social engineering lure. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate malicious redirector links and a link farm designed for SEO manipulation.

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.com/pify?keyword=minimalist+lifestyle+guide
    • http://files.sajecorp.com/uploads/1/3/1/4/131409693/343917.pdf
    • http://xewibowem.slaslo.com/uploads/1/3/2/6/132681464/4232354.pdf
    • https://cdn.shopify.com/s/files/1/0431/7760/7324/files/rilavibaxirazaxek.pdf
    • https://cdn.shopify.com/s/files/1/0428/2171/4079/files/dukawixodomog.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/nejireponazasimapekas.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/wafoxunivuru.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/vezerumevumesebiwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4526/5318/files/83015128956.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5476/files/al_quran_taj_company.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/xewurerakogoxejifu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/fukozu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0941/files/90771159787.pdf
    • https://cdn.shopify.com/s/files/1/0433/7064/3614/files/baahubali_2_sub_indo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9872/4769/files/bewafa_tu_song_mr_jatt.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_off000071f2.bin
20b48663c7bd12a33364a6acd460048ea72a65dd324c455a615bcf8ad7eee12d
pdf-font-stream PDF embedded font (sfnt) at offset 0x71F2 5012 bytes
font_01_sfnt_off000082e5.bin
4b68084fad6dd4364419a7a10125d2dfcab60e8cf9dd7d57ae1f812c35f83bf8
pdf-font-stream PDF embedded font (sfnt) at offset 0x82E5 10000 bytes
font_02_sfnt_off0000a4f8.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F8 4324 bytes