Malicious PDF — malware analysis report

Static analysis result for SHA-256 39767ebca4cce507…

MALICIOUS

PDF

33.4 KB Created: 2020-08-03 03:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 425f3b6e102ffb96f18ec380a7d802b1 SHA-1: 363f1d8f4d2e4e94b5cdcf16573f3c360b070d48 SHA-256: 39767ebca4cce50780891298347b2c1d9778526596e7d2cba504073ffd1c9611
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a redirector link pointing to ttraff.ru. Additionally, it contains a PDF link farm with 30 external links, many hosted on cdn.shopify.com, suggesting a large-scale distribution effort. The embedded URL in the document body also points to the malicious ttraff.ru domain, likely serving as a lure for users to click through to a malicious destination.

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=topix+land+rover
    • http://files.oxfordpard.com/uploads/1/3/0/8/130813645/wapox_lesunubomo_bepem.pdf
    • http://files.stameliareled.com/uploads/1/3/2/6/132681342/67254904.pdf
    • http://files.allinonepetcare.com/uploads/1/3/1/3/131384145/6736637.pdf
    • https://cdn.shopify.com/s/files/1/0438/2143/2992/files/95178245362.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7440/files/minecraft_how_to_grow_grass.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/zitenomekadulobiwisavib.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/12221607294.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/60706943038.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5737/files/91895985900.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/38241457592.pdf
    • https://cdn.shopify.com/s/files/1/0435/0610/6528/files/gatibazi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/3000/files/58203612927.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/13025415753.pdf
    • https://cdn.shopify.com/s/files/1/0433/1805/0984/files/82696298369.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/widizosatadusuzovasovodas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9101/8396/files/kefiruda.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_off000047c3.bin
7c8d2f154658168e41188f7b332787992b37f25156eacdbf5ec10441ede53e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47C3 4852 bytes
font_01_sfnt_off00005855.bin
9494f32f7702e0f6623382d5cf428dc09dd5a66b14bcb2066f747f3fad89361c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5855 9564 bytes

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