Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d82848e44a99e7…

MALICIOUS

PDF

41.7 KB Created: 2020-08-19 02:10:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ba384a377ff695e23ddc0c570c1fdc4 SHA-1: a5065d38749128a30fe2b87f4ab3dcd39fb04021 SHA-256: 57d82848e44a99e70aa50784bb47b427c679997ed4c635f2a7c911f7bd44d924
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=color+calibration+tool+for+android'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded links to Shopify domains, likely to improve search engine ranking for malicious content. No scripts were extracted, but the presence of a malicious redirector indicates a phishing or social engineering attempt.

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.ru/pify?keyword=color+calibration+tool+for+android
    • http://files.troyenekvist.com/uploads/1/3/0/7/130738955/juxir_soserawenivare_xamowunag.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/64231190174.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/49272157737.pdf
    • https://cdn.shopify.com/s/files/1/0437/0792/4635/files/science_fusion_grade_6.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9142/files/treasures_teacher_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/important_english_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0436/0850/6531/files/oceans_of_the_world.pdf
    • https://cdn.shopify.com/s/files/1/0430/1409/5001/files/toyota_motor_corporation_annual_report_2018.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72645751706.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/pujubetojokevibeliri.pdf
    • https://cdn.shopify.com/s/files/1/0443/0469/5452/files/90378592117.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0296/files/levekod.pdf
    • https://cdn.shopify.com/s/files/1/0429/2683/3823/files/cbse_guide_for_class_10_physics.pdf
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/bikorowimezu.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_off000066c6.bin
aec48736806b1823b9c5c69017132bfc9fbe4cbb87fc96b1dd712064d67c283f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66C6 4884 bytes
font_01_sfnt_off00007760.bin
b595158e5e49495e96f64a81bf19184d1854fd52fbef05ca4008af4f91ae6f7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7760 10120 bytes

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