Malicious PDF — malware analysis report

Static analysis result for SHA-256 edba5e3e9779daa7…

MALICIOUS

PDF

101.9 KB Created: 2020-08-08 03:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5979b7290743ca69249072c09fb07c1b SHA-1: 88caf30ae3af2aa784b6118cc512a2e390429790 SHA-256: edba5e3e9779daa793a1b273dd0633e0925cfcb284e47a80802c44e206522a4e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=common+acids+and+bases+list+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute content. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The primary attack pattern involves luring users through a seemingly innocuous document to a malicious URL.

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=common+acids+and+bases+list+pdf
    • http://xuxarujux.langfordlab.com/uploads/1/3/2/6/132682646/1000745.pdf
    • http://files.annasworlds.com/uploads/1/3/0/7/130739143/693615.pdf
    • http://files.elmezcalmenu.com/uploads/1/3/1/1/131164081/pukakotagu_judegiwanono_xozero_lizowes.pdf
    • http://xesaxer.playforbrooks.org/uploads/1/3/1/8/131856772/0071efd36.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/18309989433.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/tebepeguxupo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6952/files/58783461572.pdf
    • https://cdn.shopify.com/s/files/1/0432/8020/3944/files/2648341921.pdf
    • https://cdn.shopify.com/s/files/1/0433/7061/0851/files/17464222830.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6647/files/65890792130.pdf
    • https://cdn.shopify.com/s/files/1/0435/4280/6680/files/84178942508.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/delidupupukomojik.pdf
    • https://cdn.shopify.com/s/files/1/0431/4670/7104/files/lovajo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/26547879131.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/nakafivupelo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/13040351059.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/79305705006.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_off00012de0.bin
d0763fbd271711262b0a26362cc9c99fb155632731fabfacbbfc72efdb3f7c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE0 2912 bytes
font_01_sfnt_off00013843.bin
54df53268709cd2d866edc23f5f097384318bccc3356d8539853e15116cde5fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13843 5252 bytes
font_02_sfnt_off00014a03.bin
c704a974427d74e3ae3a70cfb91a9aa2a327ebf8ead830f81f1b20b65089fa26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A03 13072 bytes
font_03_sfnt_off0001745a.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1745A 16204 bytes

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