Malicious PDF — malware analysis report

Static analysis result for SHA-256 edaf0eb90f500bf8…

MALICIOUS

PDF

33.6 KB Created: 2020-09-04 05:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a270f5f1fcdfba559a845cac9ee4cae SHA-1: 3b5afd2abe6617ba52e290cabf85f40b83e74d1a SHA-256: edaf0eb90f500bf8e8df0d1077d3ac4b58fb5f596365090b4af4439150987f86
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.club/wix?keyword=a+pinch+of+salt+poem+answers'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify domains hosting other PDF files. The document body, though heavily obfuscated, contains the malicious URL and several benign-looking PDF filenames, suggesting a social engineering attempt to drive traffic to the 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.club/wix?keyword=a+pinch+of+salt+poem+answers
    • https://cdn.shopify.com/s/files/1/0439/4971/9720/files/vasovagal_syncope_patient_handout.pdf
    • https://cdn.shopify.com/s/files/1/0460/1354/6655/files/california_net_operating_loss_carryback_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/lupow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54748680829.pdf
    • https://cdn.shopify.com/s/files/1/0437/7991/5937/files/associao_de_geradores_exercicios_resolvidos.pdf
    • https://static.usrfiles.com/ugd/64d889_f5d7875e16e14de1b4f850fd5688139e.pdf
    • https://cdn.shopify.com/s/files/1/0437/5589/6990/files/29824261654.pdf
    • https://cdn.shopify.com/s/files/1/0438/2018/7805/files/mafad.pdf
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/angry_birds_transformers_telepods_walmart.pdf
    • https://cdn.shopify.com/s/files/1/0429/2168/9254/files/98814267195.pdf
    • https://static.usrfiles.com/ugd/3fd21f_eb43e9027cc34196986a22dd1fbf3b49.pdf
    • https://static.usrfiles.com/ugd/a48928_29ecbc026a1e448e8daab1a3a8ff56da.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_off00004657.bin
99bf34dd0722428cc69836b9291d99988a58494e011aebd371a39bd84c39de7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4657 5336 bytes
font_01_sfnt_off00005867.bin
41cc170545a1df55690839fba5993d192ab6e4930e0952f2eb5455186597132e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5867 9840 bytes

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