Malicious PDF — malware analysis report

Static analysis result for SHA-256 83e2e5e08b81809f…

MALICIOUS

PDF

50.4 KB Created: 2020-08-14 13:35:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12a2af8bc93ccbe6a371c9c0b5580db6 SHA-1: 39ef5fe1e893153c15d3be5abbb5d2b13ca46f94 SHA-256: 83e2e5e08b81809f513f09b913cc50699845ed2ea32547b8b232d0dc0a02603f
128 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, suggesting a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, indicating it's a primary lure. The presence of a 'download button' heuristic further supports a social engineering attack pattern.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bcdedit.+exe+for+xp
    • http://gunuk.womens4miler.org/uploads/1/3/0/8/130815017/xetikozaji.pdf
    • http://files.villatesoristjohn.com/uploads/1/3/0/7/130775834/9f58c0a1cd79.pdf
    • http://files.lafermemn.com/uploads/1/3/1/3/131380345/5835066.pdf
    • https://cdn.shopify.com/s/files/1/0437/8843/5613/files/56237610644.pdf
    • https://cdn.shopify.com/s/files/1/0428/7001/4111/files/32792199635.pdf
    • https://cdn.shopify.com/s/files/1/0434/3198/5309/files/12645308849.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86477918810.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/14131217498.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/41968479007.pdf
    • https://cdn.shopify.com/s/files/1/0432/2538/3073/files/84406673323.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6556/files/git_branch_name.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/bitegepofalekukija.pdf
    • https://cdn.shopify.com/s/files/1/0428/8918/3398/files/52534073631.pdf
    • https://cdn.shopify.com/s/files/1/0432/5608/6696/files/82635003424.pdf
    • https://cdn.shopify.com/s/files/1/0440/7135/4533/files/cancionero_musica_catolica_acordes.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_off00006f9a.bin
099c1db47766fcc8fab3aaa62fb7808bcd966a5072b903a92267c6fc162768c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9A 4876 bytes
font_01_sfnt_off0000804b.bin
c62c3ae3a4efa78b1c1d4027c21051c807b4b73cc248f84bdf5136c356dd986e
pdf-font-stream PDF embedded font (sfnt) at offset 0x804B 11380 bytes
font_02_sfnt_off0000a6c4.bin
4a41d7e182d54c13fd0401492552211af2609381ae6f503edd12761a0a0b0f88
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6C4 16484 bytes