Malicious PDF — malware analysis report

Static analysis result for SHA-256 a43af787b7685f9d…

MALICIOUS

PDF

47.3 KB Created: 2020-08-10 23:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00568dcc43c2d1e8a148a181f7a78c05 SHA-1: ab99e74ad1d1c35c0b259d42af30245e4831ac05 SHA-256: a43af787b7685f9d1d657679c7229c3ba690e78e2c34378800c52528d874a2c8
128 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. This indicates a strong likelihood of a phishing or malware distribution campaign. The presence of a 'download button' lure further supports this, suggesting the document is designed to trick users into clicking malicious links.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ielts+listening+recent+actual+test+volume+1+pdf+audio%2529
    • http://mojuted.highsandhellos.com/uploads/1/3/1/8/131856158/7030062.pdf
    • http://files.saradavisart.com/uploads/1/3/1/3/131381540/watuka.pdf
    • http://files.mrobinsonmusic.com/uploads/1/3/1/6/131637763/ebfb02c3.pdf
    • http://zurozuxob.cindykollerphotography.com/uploads/1/3/0/8/130874655/zilugezenuxabixiwu.pdf
    • http://files.mantecaeducators.org/uploads/1/3/0/7/130740127/31544f32cebc5f.pdf
    • https://cdn.shopify.com/s/files/1/0440/8823/0053/files/brche_multiplikation_aufgaben.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9162/files/22629772407.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/62220609452.pdf
    • https://cdn.shopify.com/s/files/1/0432/2131/9839/files/kewupavukejudorelebi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36920421444.pdf
    • https://cdn.shopify.com/s/files/1/0441/0923/4328/files/intellichlor_ic40_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7834/4085/files/6812155704.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/fovotowifu.pdf
    • https://cdn.shopify.com/s/files/1/0441/1519/8104/files/jugutenanumorega.pdf
    • https://cdn.shopify.com/s/files/1/0431/5217/9364/files/pugikojinunuvugonuvasis.pdf
    • https://cdn.shopify.com/s/files/1/0434/1995/9454/files/comma_splice_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/4078/5062/files/2020_oscar_winners_list.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/ftse_all_share_index.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006587.bin
a2594d3fe185fdf3a23a8c38a6a03c8e109a07743fb35ffc41cab217c3856394		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6587 5600 bytes
font_01_sfnt_off0000788d.bin
bbd476a58098562066bf69c37c105becbbc0dcffe54ce616862b823b3736fa67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x788D 9772 bytes
font_02_sfnt_off00009a3c.bin
8d975df2f50f28cfbed0e2ce76ed007b24dfad65abe09b14d26d42f1e968b3d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A3C 16156 bytes

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