Malicious PDF — malware analysis report

Static analysis result for SHA-256 c815a30342348005…

MALICIOUS

PDF

52.7 KB Created: 2020-08-06 12:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bab68e26c063248d4e7bffd489cd7987 SHA-1: fc1758480d6d23635bfe0b10f1bc498c1a8a4f04 SHA-256: c815a30342348005aa010c69521432e9de9645c8c4ec71ec615fe3e78fdbb94d
150 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, includes the URL and a keyword related to email writing skills, suggesting a lure. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content. No scripts were extracted, but the PDF structure and malicious redirector strongly suggest a phishing or redirection attack.

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=good+email+writing+skills+pdf
    • http://files.bradleywilliamsart.net/uploads/1/3/1/1/131164118/bigofodowuban.pdf
    • http://files.sanjoseexpress.org/uploads/1/3/1/3/131398046/7719881.pdf
    • http://files.ballatsmithycottage.com/uploads/1/3/1/8/131857734/levavesoje.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/pizaki.pdf
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/wisunini.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/demusikaregoli.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3360/files/hospital_and_clinical_pharmacy_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/mikudubonorobujona.pdf
    • https://cdn.shopify.com/s/files/1/0429/8414/5049/files/97412305193.pdf
    • https://cdn.shopify.com/s/files/1/0440/6503/0309/files/dictionaries_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/tojibaxolabeju.pdf
    • https://cdn.shopify.com/s/files/1/0440/7053/5318/files/6907533105.pdf
    • https://cdn.shopify.com/s/files/1/0436/0955/5107/files/aldous_huxley_as_portas_da_percepo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/capitec_bursary_application_form_2020.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075db.bin
7054202772682b24f11599058d951f637b8cd39cbb91149f9ca434d6f8725165
pdf-font-stream PDF embedded font (sfnt) at offset 0x75DB 3304 bytes
font_01_sfnt_off000081c0.bin
ca8a96d6ed2ec24688cfbd074927a23d3654b3f3d1b5ec00b0612bcad003ade0
pdf-font-stream PDF embedded font (sfnt) at offset 0x81C0 5336 bytes
font_02_sfnt_off000093ef.bin
fba97d65452c5953d06903bc8e9446b5f402243a032b768cfac4ce6d3320f788
pdf-font-stream PDF embedded font (sfnt) at offset 0x93EF 10492 bytes
font_03_sfnt_off0000b796.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB796 4324 bytes