Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a29a8c5a01bb3ad…

MALICIOUS

PDF

42.3 KB Created: 2020-08-16 17:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80a31df97d8e34feab64dc1171400f2e SHA-1: 7cde5bdfdc9b762a4b5ad833391ce1b41beb5f8c SHA-256: 5a29a8c5a01bb3ad5719490babffa98d88dc77bcc06a17f707201672e32eb913
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised as homework answers. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. The primary malicious URL identified is https://ttraff.cc/pify?keyword=inequality+word+problem+homework+answers, which is flagged as a malicious redirector.

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=inequality+word+problem+homework+answers
    • http://files.hendersonbagelcompany.com/uploads/1/3/1/4/131438069/xuforovefapiti_xijere_vesaruziluwoni.pdf
    • http://bajotux.crimsonmist.com/uploads/1/3/1/3/131383309/9736991.pdf
    • http://files.pregnancybirthbeyond.net/uploads/1/3/0/7/130775017/netemaxegagu_kifoz_sotisin.pdf
    • http://files.debbiemorrison.net/uploads/1/3/2/6/132682076/caea708d514.pdf
    • https://cdn.shopify.com/s/files/1/0429/1140/0102/files/peluvuvorebikunujex.pdf
    • https://cdn.shopify.com/s/files/1/0435/1941/0328/files/katezobazamuvonedojep.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/78993660982.pdf
    • https://cdn.shopify.com/s/files/1/0434/7713/9613/files/15410533249.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdf
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/65916468008.pdf
    • https://cdn.shopify.com/s/files/1/0431/6620/4066/files/16540904505.pdf
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/7417982959.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11147191401.pdf
    • https://cdn.shopify.com/s/files/1/0461/9527/7974/files/forecast_spreadsheet_excel.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_off00006460.bin
c3eef8280e8c90bc3aa8b41853215ac378bda29ce32284db5154ebc77bac4de3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6460 5660 bytes
font_01_sfnt_off00007777.bin
c122b390d830cce4ef970632aad69b044ed03798206390646e8e522464524a14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7777 10840 bytes

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