Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbd09baec884a1b…

MALICIOUS

PDF

45.3 KB Created: 2020-09-02 09:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 434ceaf37f52f003fcd2c1e2652e5ba8 SHA-1: 24f5f0aad37289cc231263fbb10a42b84c0ffa27 SHA-256: bbbd09baec884a1b9fe913e09077d9d9be7185f76c30f4cc80fef4344851246a
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'English to russian translation skills test answers' and a URL that matches the redirector heuristic. This suggests the document's primary purpose is to trick the user into clicking the malicious link, likely for phishing or malware distribution. The presence of many Shopify links, while individually benign, contributes to a link farm pattern.

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/pify?keyword=english+to+russian+translation+skills+test+answers
    • https://cdn.shopify.com/s/files/1/0438/3296/7318/files/git_bash_script.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/download_avengers_endgame_full_movie-0.pdf
    • https://cdn.shopify.com/s/files/1/0463/5420/2790/files/70252578888.pdf
    • https://cdn.shopify.com/s/files/1/0438/3703/0560/files/77041365872.pdf
    • https://cdn.shopify.com/s/files/1/0436/9688/1814/files/makuwog.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/zukitakitupasufuluv.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/bapifenezar.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/xowubotukurowaluza.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0789/files/adulterants_in_sugar.pdf
    • https://cdn.shopify.com/s/files/1/0434/3418/0769/files/2846243307.pdf
    • https://cdn.shopify.com/s/files/1/0436/0437/7757/files/florida_vehicle_bill_of_sale_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/growth_mindset_posters_tpt.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/capture_one_pro_11_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0437/2486/5685/files/69747969294.pdf
    • https://static.usrfiles.com/ugd/6116da_479f4a5376564a49b2b3878a1e79a6e6.pdf
    • https://static.usrfiles.com/ugd/d55797_4e592ea81a7345ad9c1fe5836c3a629d.pdf
    • https://static.usrfiles.com/ugd/affaa6_70f0f968416745378cd70f5dbc0dedb1.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_off00007442.bin
f518b9797057d8ab8ab822566adc490135f6e38886e1896360bcf4bed1bb11ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x7442 5060 bytes
font_01_sfnt_off00008587.bin
fdcb8f94ccb810a3c05f8b9c0938f3605af9670c2de0f9d27ec694ce852cd856
pdf-font-stream PDF embedded font (sfnt) at offset 0x8587 9976 bytes