Malicious PDF — malware analysis report

Static analysis result for SHA-256 c98b1e73cdcf607e…

MALICIOUS

PDF

50.3 KB Created: 2020-08-07 10:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ef9b3509c89de0ac359d16297da6ca6 SHA-1: 29d17c50677e491df6052d1d3d03620a288c832b SHA-256: c98b1e73cdcf607eaa7c1e9343bed42fb010a8c1c58e24925a277f507b708a9f
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=math+behind+machine+learning+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are to Shopify domains. The document body, though heavily obfuscated, also contains the malicious URL, suggesting the primary intent is to redirect users to potentially harmful 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.ru/pify?keyword=math+behind+machine+learning+pdf
    • http://files.fieldofdreamshuntprogram.org/uploads/1/3/1/3/131383478/lover-doxojanetu-xazejokudedugi.pdf
    • http://files.tableandelights.com/uploads/1/3/1/3/131380052/c1ed3cd4936.pdf
    • http://files.roxborohomeeducators.org/uploads/1/3/1/4/131406082/xadarid-burew-desugumuj-lejon.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5022/files/apgenco_ae_mechanical_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/maxxforce_7_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5170/files/d_d_4e_dungeon_delve.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/kulajarufafevuxakor.pdf
    • https://cdn.shopify.com/s/files/1/0434/2749/6087/files/57162651887.pdf
    • https://cdn.shopify.com/s/files/1/0428/4134/2108/files/98323358268.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/38668328991.pdf
    • https://cdn.shopify.com/s/files/1/0436/6496/5782/files/nigezovurubuzem.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/spontaneous_generation_vs_biogenesis.pdf
    • https://cdn.shopify.com/s/files/1/0434/9735/7472/files/5932472627.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/559923516.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lutekalejore.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bf9.bin
96ee4357caaba7bada912c116a201a538daacf2790b0261cc12f47d143233006
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF9 2920 bytes
font_01_sfnt_off00008667.bin
6982440e7f688734c451ddc4d23bb09bf9a98810a285c4da8ec4ad579ab64111
pdf-font-stream PDF embedded font (sfnt) at offset 0x8667 5536 bytes
font_02_sfnt_off00009918.bin
f6a03639be775ee19ca4abdf464f0888c0d8d7a2e31f7ef4ef1f88f8e969c16f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9918 10532 bytes