Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9c6507e3097c9c…

MALICIOUS

PDF

33.5 KB Created: 2020-08-23 09:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c2d5c4daf0a4ed66738e1cf8e01a388 SHA-1: 7842b2ed6dcf8d8a8a75403a838ee22da2cf9983 SHA-256: bb9c6507e3097c9cfd2270bd1deb4a4eace3b2a3b3e5d05d687f2ab776ae077f
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and text related to 'manual audifonos bluetooth sony wi c300', suggesting a lure. The file also exhibits a PDF link farm heuristic, embedding numerous external links, many hosted on Shopify, which are likely part of a SEO-based distribution strategy. The primary malicious IOC is the redirector URL, which likely leads to further 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.cc/pify?keyword=manual+audifonos+bluetooth+sony+wi+c300
    • http://files.yolimassage.com/uploads/1/3/1/3/131381782/bd5a13f.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/mifigikakidekeguzuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/2437/6227/files/cardiac_arrest.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/podabopir.pdf
    • https://cdn.shopify.com/s/files/1/0430/0298/6659/files/sri_manjunatha_songs_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/pavojinule.pdf
    • https://cdn.shopify.com/s/files/1/0437/0527/0427/files/kirchhoff_s_theory_law.pdf
    • https://cdn.shopify.com/s/files/1/0431/4847/6570/files/gemulopiwe.pdf
    • https://cdn.shopify.com/s/files/1/0439/4424/7451/files/caterpillar_416c_backhoe_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/6457/2569/files/netbeans_java_swing_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/cell_cycle_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/4947/4453/files/52672453591.pdf
    • https://cdn.shopify.com/s/files/1/0434/5089/2454/files/how_many_covalent_bonds_can_nitrogen_form.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_off000043cb.bin
940cbb34a54799c7e9acbd649aa772a6b3febd10a784e857efdab233e05f4aac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43CB 5660 bytes
font_01_sfnt_off0000572a.bin
51a81a7192206314f4ef19933e230523050b15912fb7cb34b00b82246bf0624a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x572A 10080 bytes

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