Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb88d36a281ccc6…

MALICIOUS

PDF

45.2 KB Created: 2020-08-02 08:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67f3cd1bc77a59de3ee9b1aade474755 SHA-1: 725ed344f98886b6fb3a1baa87a9a337e9511443 SHA-256: 9eb88d36a281ccc66d7169a50a324870a0c43962feb6c35c8f522ddfa77f6ee3
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, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=ffmpeg+convert+mkv+to+mov'. The document body, though heavily obfuscated, also contains this URL and numerous other links, suggesting a link farm or redirection tactic. The presence of many Shopify-hosted PDF files, some marked as benign and others unknown, indicates a common pattern for hosting malicious 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=ffmpeg+convert+mkv+to+mov
    • http://files.shackboldon.com/uploads/1/3/0/9/130969497/didelalizijejebo.pdf
    • http://files.broadband4arizona.com/uploads/1/3/2/6/132695525/wivar-fozurivuzaj-sovizax-vovobabenavuz.pdf
    • http://files.nataliedownes.com/uploads/1/3/1/8/131856435/4768287.pdf
    • http://files.rootedaltarministries.org/uploads/1/3/1/4/131438453/9505102.pdf
    • http://files.greenbelthumanesociety.org/uploads/1/3/0/7/130776393/zaxerira.pdf
    • https://cdn.shopify.com/s/files/1/0428/4098/1670/files/tamagusuginumimesuvafuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/72514898453.pdf
    • https://cdn.shopify.com/s/files/1/0438/2454/5949/files/15918850002.pdf
    • https://cdn.shopify.com/s/files/1/0429/1087/5815/files/nufuwunafiriletogabexan.pdf
    • https://cdn.shopify.com/s/files/1/0432/1171/8820/files/45803517887.pdf
    • https://cdn.shopify.com/s/files/1/0432/7650/1147/files/fadajopowulevosopisutup.pdf
    • https://cdn.shopify.com/s/files/1/0438/0724/4450/files/47141207480.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/rajof.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/topumilafapudifotapos.pdf
    • https://cdn.shopify.com/s/files/1/0430/6246/0577/files/41181286654.pdf
    • https://cdn.shopify.com/s/files/1/0437/6150/0309/files/vagereziw.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/taxujad.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ef6.bin
da987ab8f504c8575ae6ab2dfa8c0ea338da55c1d693a3fbecb5743726c79053
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF6 4996 bytes
font_01_sfnt_off00007fff.bin
3da9a0e87e4696ba3d72ec999ebda3c0ded86a9ee949aa5a3237bfee94232c69
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFF 12496 bytes