Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f3afbc64feb539…

MALICIOUS

PDF

48.6 KB Created: 2020-09-29 11:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0243bfc83b97ffd8dd6c480b2dbec5aa SHA-1: dab846a5911823ec729c3429319ffd6477599a13 SHA-256: 47f3afbc64feb5399560912a697d8cfccb9c528bf375ab79c546a2c9216ca96a
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL is 'https://ggtraff.ru/mozel?keyword=absorption+of+carbohydrates+pdf', which is likely used to lure victims. The document body, though heavily obfuscated, contains this URL and other benign-looking URLs hosted on Shopify, suggesting a link farm for SEO poisoning or redirection.

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://ggtraff.ru/mozel?keyword=absorption+of+carbohydrates+pdf
    • https://site-1037000.mozfiles.com/files/1037000/dizoxuko.pdf
    • https://cdn.shopify.com/s/files/1/0458/6297/7689/files/dashes_worksheet_7th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5005/files/26949580777.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/70577063159.pdf
    • https://cdn.shopify.com/s/files/1/0462/2139/4073/files/71759749792.pdf
    • https://cdn.shopify.com/s/files/1/0479/1772/7910/files/68059843956.pdf
    • https://cdn.shopify.com/s/files/1/0441/0517/1096/files/aletha_solter_tears_and_tantrums.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.pdf
    • https://d6e3627c-1bf1-4535-89cd-81934fea7628.filesusr.com/ugd/70c1f8_c458b30e6f3d4402839a065947420e22.pdf?index=true
    • https://714832c4-313e-4253-b6ec-68c40ed77ba2.filesusr.com/ugd/3225da_4406ed82a1c840429d6d55b00fb1dab2.pdf?index=true
    • https://3b89501f-ea37-46fe-90d9-5a0434010cc6.filesusr.com/ugd/bc0b97_720ec3a5e0454d54bb02affd55db53d1.pdf?index=true
    • https://7b3d7674-2d35-44eb-b1c2-430e0c63ee1c.filesusr.com/ugd/96564c_e7ab60af14364ec08cbc8881f8c95b57.pdf?index=true
    • https://6b6dae51-3297-45ae-ac11-f9d742573c6f.filesusr.com/ugd/89602e_cfef6a74c7f04075823ae0232602c82b.pdf?index=true
    • 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_off0000630b.bin
0b89f151b4f48abc691817f1767cdc7d08952c0a0fb2c255d1766dd202ce3ead
pdf-font-stream PDF embedded font (sfnt) at offset 0x630B 5232 bytes
font_01_sfnt_off000074c2.bin
07898f56fff7655e61e5b9b62add9f0731e3ac94067e12559c51ed66ccecef46
pdf-font-stream PDF embedded font (sfnt) at offset 0x74C2 10008 bytes
font_02_sfnt_off00009700.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x9700 4324 bytes
font_03_sfnt_off0000a500.bin
61b5834795c100ba378ca028d09c997c981cf873dda5544c49ba64bc1340aa19
pdf-font-stream PDF embedded font (sfnt) at offset 0xA500 4328 bytes