Malicious PDF — malware analysis report

Static analysis result for SHA-256 588e8f4b94ea994d…

MALICIOUS

PDF

42.2 KB Created: 2020-08-31 10:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0735a4d43d623c12a2df814758ef78a3 SHA-1: 9d357d8ce5f50c319529636de4c2a0306c8b7e46 SHA-256: 588e8f4b94ea994dc993155256c086c3df1958d7c7e35c1d16d67a275e7c125f
150 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains text that appears to be related to microelectronic circuits, suggesting a pretext for the malicious link. The presence of numerous external PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy to improve search engine visibility for the malicious content.

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.com/wix?keyword=microelectronic+circuits+pdf
    • https://cdn.shopify.com/s/files/1/0438/0826/0258/files/bitulunavajewabidojide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3613/0983/files/muzipot.pdf
    • https://cdn.shopify.com/s/files/1/0433/9286/0318/files/audition_online_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0462/8126/1205/files/82134004886.pdf
    • https://cdn.shopify.com/s/files/1/0457/0031/7340/files/non_communicable_diseases_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/javascript_blob_example.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/45591698156.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/86382504302.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9283/files/fumifikagozopebufukox.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/jagunidawidevej.pdf
    • https://cdn.shopify.com/s/files/1/0437/2375/1575/files/andrzej_pozowski_alloplastyka_stawu_biodrowego.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/cisco_ccna_networking_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/38482657483.pdf
    • https://cdn.shopify.com/s/files/1/0433/6769/4487/files/bedozinaxiki.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/kasetepanereretadog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.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_off00006733.bin
690425d952a3e9d5eb59a6fac7308f2f3d3361b635b409a3e93542af0416a7ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x6733 4944 bytes
font_01_sfnt_off00007815.bin
ace546ad462b2e4d1982b2c604e3bc1af9f8b2b02bd448ebf26ff5b3ca0fae5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7815 10380 bytes