Malicious PDF — malware analysis report

Static analysis result for SHA-256 c78c1a3cdaaa023f…

MALICIOUS

PDF

41.9 KB Created: 2020-09-02 00:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76af4730f3a23d0c8fb47df6b9137860 SHA-1: 987fb209eaecdbf8488e81f4a328709bc1ac9584 SHA-256: c78c1a3cdaaa023f787e8034e0dacf4c913a1d6efa5e60859f9eb47d6270b86f
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous PDF links suggests an attempt to manipulate search engine results or redirect users to 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.com/wix?keyword=answer+how+are+you+feeling
    • https://cdn.shopify.com/s/files/1/0461/4186/6137/files/bijatetarazimobotatit.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/xezifam.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/tagemazubisexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/33953272813.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7004/files/bubble_answer_sheet_1_200.pdf
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/20503690627.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/motaz.pdf
    • https://cdn.shopify.com/s/files/1/0463/0134/8002/files/dopowipefat.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/30170712408.pdf
    • https://static.usrfiles.com/ugd/0c4177_b1f6496996514912a453efda8d04cc28.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_9559a6cdcc934c3184567b20a5e2a498.pdf
    • https://static.usrfiles.com/ugd/90423f_dd183c4839d3457298ed1b91c4201e68.pdf
    • https://static.usrfiles.com/ugd/89064d_ad00715770a74e36876c97d0607d9c51.pdf
    • https://static.usrfiles.com/ugd/de3d83_8f85502dab6a4304acddcf7ae3894cca.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/amazon_web_services_tutorial_the_ultimate_beginners_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/sample_of_recommendation_letter_for_university_admission.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_off0000656d.bin
fbd4eea042cfc473cf07447cf1dcbdc6f4a5a52d681ef49e1a706b27f0dd2306		 pdf-font-stream PDF embedded font (sfnt) at offset 0x656D 5212 bytes
font_01_sfnt_off0000773f.bin
8f58f42dc14fb56877dd1597cb1b17a6db092bd6d1a04b46d9b2b4f20a316b03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773F 10384 bytes

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