Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8f94552c13a4413…

MALICIOUS

PDF

34.6 KB Created: 2020-07-09 12:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06ac201e37988827e9a86c397e79ea0f SHA-1: 5bc34eaeaa8fe400cb3a035ac65ad3b813ee78ee SHA-256: a8f94552c13a4413155609a4bf0bc1124e12a3c837eaacfdff4499e76450f878
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to redirector infrastructure. The primary lure appears to be a fake 'Telugu bible pdf file download' which redirects to the malicious URL https://ttraff.ru/pify. This suggests a link-farming or redirection-based attack designed to lead users to malicious content. The presence of numerous external PDF links also indicates a potential SEO poisoning or link farm strategy.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=telugu+bible+pdf+file+download
    • http://files.heracleous.org/uploads/1/3/1/3/131398093/5858615.pdf
    • http://files.m25initiative.org/uploads/1/3/1/3/131398432/fijupotapilewoxomas.pdf
    • http://files.iucnbsg.org/uploads/1/3/1/4/131438024/686dfb92f68596.pdf
    • http://files.vegetablekids.net/uploads/1/3/1/1/131164567/mozadufowut_besel.pdf
    • http://files.vanessanysten.com/uploads/1/3/0/7/130739769/958ec35a8.pdf
    • http://files.macpacdanes.com/uploads/1/3/2/6/132680955/xodukejomerot.pdf
    • http://files.beaverdamchurchonline.com/uploads/1/3/1/4/131408241/sobuwelexapinifo.pdf
    • http://files.suncoastsoul.com/uploads/1/3/1/3/131379612/baretanemomimu.pdf
    • http://files.biophysical-ecology.com/uploads/1/3/1/4/131406356/xivut_girusidusowele_finusagon.pdf
    • http://files.giveitaway.net/uploads/1/3/2/3/132303020/4972202.pdf
    • http://files.lkoc.org/uploads/1/3/1/3/131383497/bofepowoj.pdf
    • http://files.whistlingfrogresort.com/uploads/1/3/2/6/132681002/masaberilanimubaloji.pdf
    • https://nojurofezep809160310.files.wordpress.com/2020/07/6522549690.pdf
    • https://denines.files.wordpress.com/2020/07/8713386560.pdf
    • https://xezerak.files.wordpress.com/2020/06/vonefasumujebipufalelaja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89573664631.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54440827626.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66083684812.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_off00004c68.bin
4023b0283e8b42f3d9075c6a891b719e13c43d0c568d71f98ba7f50a39cb82d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C68 4920 bytes
font_01_sfnt_off00005d3b.bin
6dd20889adc71bf8e014fc868a1c0cfe2edc7295d1a16a462ff8187f31d29933
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3B 9596 bytes