Malicious PDF — malware analysis report

Static analysis result for SHA-256 f13b164e67737713…

MALICIOUS

PDF

45.9 KB Created: 2020-08-07 08:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c17b4d5578f5682cd7c20039c974a5b0 SHA-1: e420e9818a52c49e9e5e5fcb63d13269c68234c5 SHA-256: f13b164e677377135158bc35262aacdaa8371dfc28b69f067a5aa0f9e6800a12
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF document contains a mass of external links, many of which are hosted on Shopify and appear to be SEO-optimized content. One critical heuristic firing indicates a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=cause+and+effect+essay+outline+pdf'. This suggests the document is designed to lead users to malicious sites under the guise of providing essay outlines. No scripts were extracted, but the PDF structure and link farm indicate a social engineering 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.cc/pify?keyword=cause+and+effect+essay+outline+pdf
    • http://files.iguassuac.com/uploads/1/3/1/3/131398140/8164214.pdf
    • http://files.ilanitovadya.com/uploads/1/3/1/0/131069899/mazipetugarezu.pdf
    • http://toligevin.darkhorsegolf.com/uploads/1/3/1/6/131606260/kixog-vafax-zevipizer-tedemetusewetuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/2658/6519/files/23695799249.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3205/files/warusotonok.pdf
    • https://cdn.shopify.com/s/files/1/0435/7508/3171/files/organizational_culture_survey_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0432/2656/2722/files/round_corners_illustrator.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7473/files/armidale_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/26604914314.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/kozowudiruwenoxiwiza.pdf
    • https://cdn.shopify.com/s/files/1/0434/4233/9992/files/nudemu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/zanoze.pdf
    • https://cdn.shopify.com/s/files/1/0431/7485/4820/files/bovirapexuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zimupumunilojoduwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/gipejibuxonuladubukamezeg.pdf
    • https://cdn.shopify.com/s/files/1/0435/6793/9743/files/29548121470.pdf
    • https://cdn.shopify.com/s/files/1/0439/7717/9294/files/lagojosivenaw.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_off00007778.bin
69caa5440551978febbf8dc6ede0ae13d6c7c2f001fd979c986f5b2b985e710d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7778 5060 bytes
font_01_sfnt_off000088ce.bin
41ef681ed532ce511a06c9a1fb913d3ee0db27aff8d911b40ff90b58a50ceff8
pdf-font-stream PDF embedded font (sfnt) at offset 0x88CE 9964 bytes