Malicious PDF — malware analysis report

Static analysis result for SHA-256 4919004214ad1c52…

MALICIOUS

PDF

70.4 KB Created: 2020-08-07 04:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bfa5925be03407582f26eadffa1aff5 SHA-1: 0539bbe42cf11956c5169bf8b887611bf79ee845 SHA-256: 4919004214ad1c528d1e9a7c3f125d10fecb753dae704be39e673a933618fa61
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=seoul+metro+map+chinese+pdf'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its malicious intent. The primary attack pattern involves luring users to a malicious site via a deceptive link.

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=seoul+metro+map+chinese+pdf
    • http://files.seizediem.com/uploads/1/3/1/4/131438741/vewim_gifesimefipotu.pdf
    • http://files.ourplacelochsidelincluden.com/uploads/1/3/1/4/131483143/f0c02ba.pdf
    • http://files.hikingnewfoundland.com/uploads/1/3/2/6/132695244/gulax.pdf
    • https://cdn.shopify.com/s/files/1/0429/8316/2019/files/online_sniper_games.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/adaylk_kaldrma_snav_kitab.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/70605274386.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/takasemopijoxesowokiki.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/lexomidogimisu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/bekowi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/38119626993.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3077/files/gobinoxelopadifesunizisi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7143/1065/files/27743526573.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4853/files/xopapaxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4924/6110/files/boutique_hotel_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/1210/4103/files/42045897451.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f1e.bin
789f29b126233d77e72b4948299827c810b463b4f1fdb7b5b0a8d4d82788dee6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F1E 13008 bytes
font_01_sfnt_off0000c88f.bin
6fe50224a93b0e7212053f493c8b0b37bf3d109a2c98076839df63ddd7d037e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC88F 5380 bytes
font_02_sfnt_off0000da9e.bin
6d8e63a67cc29416e20151e0f5daea932ac25a45b452b94afbb6bd2c6a1b2603		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9E 10440 bytes
font_03_sfnt_off0000fdd9.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD9 4324 bytes

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