Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82d96ee79fc3695…

MALICIOUS

PDF

45.0 KB Created: 2020-08-13 00:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 684cfd63232af5ce13ee7ecec9864548 SHA-1: e3d7d4bfcdfea17aa5f8b2d48678ac1a108b80f2 SHA-256: c82d96ee79fc3695e80a887cca51e639e314ad7e360c50a9ace42535d083f657
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Causes of epilepsy pdf' and a URL that appears to be part of a link farm designed to attract users. The primary malicious link identified is https://ttraff.ru/pify?keyword=causes+of+epilepsy+pdf, which is likely used to redirect users to further malicious content. The presence of a link farm suggests an attempt to improve search engine ranking for malicious content.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=causes+of+epilepsy+pdf
    • http://files.serenitywholisticliving.com/uploads/1/3/1/4/131408899/papoj-motaf-sasubikufol.pdf
    • http://niboduvi.asia-days.com/uploads/1/3/0/7/130739835/959b4a6e58f0d05.pdf
    • http://files.minksfamily.com/uploads/1/3/1/6/131636957/bamitav.pdf
    • http://files.freezeyogurtbar.com/uploads/1/3/2/6/132696465/6031327.pdf
    • http://files.cornerpostcowboychurch.com/uploads/1/3/1/4/131438718/eabd7baf1756.pdf
    • https://cdn.shopify.com/s/files/1/0431/4680/5404/files/zipubikepasojozivu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/fubofagagirewar.pdf
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/biocenosis_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/gefexokigigonajedeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/84515127538.pdf
    • https://cdn.shopify.com/s/files/1/0441/1473/9352/files/xinosigujuzanatumupefubi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5548/files/bowikopax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0677/8784/files/83011949957.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1487/files/mufida.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/septoplastia_procedimiento_quirurgico.pdf
    • https://cdn.shopify.com/s/files/1/0440/9019/6133/files/66022990222.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_off000070fa.bin
f71f45d34b6a2ee7a45702c3617586282f8c58687550d9e6a309765af4d0abbc
pdf-font-stream PDF embedded font (sfnt) at offset 0x70FA 4948 bytes
font_01_sfnt_off000081ec.bin
81c6e33aa7b17c90cd3f1107b5af45913706980fcf26f0e44a94126ba2bfb6cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x81EC 11220 bytes