Malicious PDF — malware analysis report

Static analysis result for SHA-256 a519d7226ea0c81f…

MALICIOUS

PDF

44.2 KB Created: 2020-08-10 03:33:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5139f71671e70626263b1f4bc799b03f SHA-1: 1f05454fe89f39ff0d3dabec35058a18275d7fb0 SHA-256: a519d7226ea0c81f508dc9a4e18cf3a7dc29b954b663aafc510522fc186afd5b
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=refractive+index+of+glass+slab+using+travelling+microscope+pdf'. This indicates a likely phishing or malware distribution attempt. The presence of a large number of external PDF links, many pointing to Shopify, suggests a link farm tactic to improve search engine ranking for malicious content.

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/pify?keyword=refractive+index+of+glass+slab+using+travelling+microscope+pdf
    • http://files.drewclausen.com/uploads/1/3/1/4/131406535/katomegelafawemepak.pdf
    • http://files.boswellsfurniture.com/uploads/1/3/1/4/131453206/880e4.pdf
    • http://files.harvestogtc.com/uploads/1/3/0/7/130739155/159dd4f.pdf
    • http://files.otellis-restaurant.com/uploads/1/3/1/8/131857626/luxidowinixit.pdf
    • https://cdn.shopify.com/s/files/1/0447/5063/5162/files/curious_researcher_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/3070/7356/files/penixuje.pdf
    • https://cdn.shopify.com/s/files/1/0434/5587/3190/files/12292672986.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dazexirorojukulovamedifuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/6487/6453/files/xawebewazotatiwexok.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/64188605722.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4750/files/xonetepigakixetol.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/probability_examples_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0434/0465/6797/files/critical_reading_skills.pdf
    • https://cdn.shopify.com/s/files/1/0429/0461/7119/files/biwelonebiwe.pdf
    • https://cdn.shopify.com/s/files/1/0446/8968/6681/files/mcdougal_littell_american_literature_grade_11.pdf
    • https://cdn.shopify.com/s/files/1/0427/7442/9852/files/didojoxad.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_off00006a6f.bin
51cfcd60727eaebd8e2fbb11f0eaeffc5756006fc3314a33bb1030a401b88f4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6F 5748 bytes
font_01_sfnt_off00007dfc.bin
dbd83688034e8365cfa1850e68f66363346209bab380cb1d4d74d5ff60d70302		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFC 10980 bytes

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