Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea3e7d1d3977feb…

MALICIOUS

PDF

43.7 KB Created: 2020-08-14 10:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ca9d68428c170d568534c307a38e9c6 SHA-1: 56b4bc7e6b423774f5aa1e2654720dbed1697112 SHA-256: dea3e7d1d3977febb538fec71a3ba0f9b57a5939c8b1711b72ec96fb1578ef2b
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to ttraff.cc, which is known malicious infrastructure. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to lure the user into clicking the malicious link. The presence of numerous PDF links, many hosted on Shopify, indicates a potential SEO poisoning or link farm tactic to distribute the malicious payload.

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.cc/wb?keyword=pre%20writing%20skills%20worksheet%20pdf
    • http://mupepev.utecoaches.com/uploads/1/3/1/4/131483025/posovema.pdf
    • http://monovex.joelwbarrows.com/uploads/1/3/1/3/131378776/wovuzodimago-wuravekugubaj.pdf
    • http://files.graceanddiggs.com/uploads/1/3/2/7/132710763/f5ac4012de82.pdf
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/44033558049.pdf
    • https://cdn.shopify.com/s/files/1/0428/9147/7148/files/ginisuwimuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/7722/1017/files/campylobacter_fetus_en_bovinos.pdf
    • https://cdn.shopify.com/s/files/1/0428/2066/5510/files/82802995223.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/26552415412.pdf
    • https://cdn.shopify.com/s/files/1/0437/8473/2829/files/75367523996.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/lenoragexukile.pdf
    • https://cdn.shopify.com/s/files/1/0432/0421/4942/files/52292309124.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/spinal_av_malformation_radiology.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/honda_trail_90_parts.pdf
    • https://cdn.shopify.com/s/files/1/0434/7677/9174/files/lebiki.pdf
    • https://cdn.shopify.com/s/files/1/0438/0819/4722/files/auto_electrician_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/pojavekatefizozerimupip.pdf
    • https://cdn.shopify.com/s/files/1/0434/7926/9541/files/53515312889.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_off00006de5.bin
8a00083c8912dfabdf4676873e6271f9b377535a074e7aaf19437f053b65846b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE5 5252 bytes
font_01_sfnt_off00007fd1.bin
4012f08c12e85b326ee656ff748335f22b6a5280feb7dbc24d0d4cc490572a62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD1 10032 bytes

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