Malicious PDF — malware analysis report

Static analysis result for SHA-256 55820185bab89ef4…

MALICIOUS

PDF

38.7 KB Created: 2020-08-08 18:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0dbfd2571b575a4501809d8f6cf873d SHA-1: cdb07d1c91b07a651876a957e09286bff4c89186 SHA-256: 55820185bab89ef451224b73c4697812a469ff652c0aeb56b6c071e43114ead5
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=hydrogenation+of+benzene+pdf`. This indicates the document's primary purpose is to lure users to a malicious site. The PDF also contains a large number of embedded external links, characteristic of a link farm, further supporting the malicious intent. No scripts were extracted, but the embedded URL is sufficient to classify the attack pattern.

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://ttraff.ru/pify?keyword=hydrogenation+of+benzene+pdf
    • http://files.teamanton.net/uploads/1/3/2/6/132696506/kokilozixovewivaluri.pdf
    • http://tuzubini.seraphimschool.com/uploads/1/3/1/1/131163599/44639f4b0390a.pdf
    • http://pamegi.matongotours.org/uploads/1/3/2/7/132740435/zutojofofas.pdf
    • http://files.simplydivinesuds.com/uploads/1/3/1/4/131407812/23f3d849.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/foditivamuwapoxipefe.pdf
    • https://cdn.shopify.com/s/files/1/0436/7033/9737/files/61564252760.pdf
    • https://cdn.shopify.com/s/files/1/0448/4320/4765/files/apc_back-_ups_xs_1000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1542/files/convert_gb_to_mb.pdf
    • https://cdn.shopify.com/s/files/1/0434/5973/9814/files/junior_achievement_economics_study_guide_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/3842/5766/files/60154561235.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/63984474687.pdf
    • https://cdn.shopify.com/s/files/1/0434/2182/7222/files/98548390257.pdf
    • https://cdn.shopify.com/s/files/1/0433/4498/6280/files/canzoniere_chitarra_download_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0449/4855/3887/files/carnatic_music_book_in_tamil.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_off00004cc1.bin
0215b63ce8d0d6886c46e84dc2507c7c830d2a3c9cfad1a6b43f023f19d49ff7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CC1 5040 bytes
font_01_sfnt_off00005df9.bin
2326c67079a89a1c0400320763b8a47e3081c79a20525d34daa3384aa54ca63b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF9 10028 bytes
font_02_sfnt_off00008032.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x8032 4324 bytes