Malicious PDF — malware analysis report

Static analysis result for SHA-256 327c40db145ca1fc…

MALICIOUS

PDF

90.1 KB Created: 2020-07-29 13:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e13c68682430c5b9eadacc5ca7d5395 SHA-1: e10c4ed2c2a9d8cea2babc3966286c319e1ef2ec SHA-256: 327c40db145ca1fc081ea55406666468f6204af12018c1f6bec67056c2c7125b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=wave+motion+in+elastic+solids+pdf', is flagged as a known malicious redirector. The document body is heavily obfuscated and appears to be generated content, further supporting the malicious intent.

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=wave+motion+in+elastic+solids+pdf
    • http://files.healthinharmonywellness.com/uploads/1/3/1/8/131872105/2fb589dd757946.pdf
    • http://files.ellenjohnsonsirelafcorruption.com/uploads/1/3/1/6/131637108/wakoxipe_bosowazerubanow_nalekeloteridim.pdf
    • http://files.chrisbracebuilders.com/uploads/1/3/0/7/130776484/dafidut_wolisuwesum.pdf
    • http://files.net4bags.com/uploads/1/3/1/0/131070035/5860cef6a.pdf
    • http://files.marenerji.com/uploads/1/3/2/7/132740352/1086431.pdf
    • https://cdn.shopify.com/s/files/1/0429/2644/0607/files/39437304465.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/16633863294.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/48659080889.pdf
    • https://cdn.shopify.com/s/files/1/0432/4546/9858/files/88788282318.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2727/files/60485884371.pdf
    • https://cdn.shopify.com/s/files/1/0437/1621/4939/files/gafoxagutanimisu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3314/0127/files/tidupimidifivaja.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/menum.pdf
    • https://cdn.shopify.com/s/files/1/0437/6055/0046/files/mevugitazemomofoxaleki.pdf
    • https://cdn.shopify.com/s/files/1/0430/7261/8657/files/vakekegidozibemave.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7134/files/73580511971.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/dunifaxuranowajun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.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_off000103fc.bin
709555548e663d815579aced5acb876ec6f85708ddf57a4e54f8455bde1a6b6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x103FC 5064 bytes
font_01_sfnt_off00011530.bin
1e48efc1b7be17b7c163572c14bc31e361e06a6f1d8bbf4071719c88fb4d4f29
pdf-font-stream PDF embedded font (sfnt) at offset 0x11530 15432 bytes
font_02_sfnt_off000144de.bin
cbb41de168ca2eee702d85af283bad252a745a311fedbdba005ba7cabb6ad46e
pdf-font-stream PDF embedded font (sfnt) at offset 0x144DE 16248 bytes