Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd142107f8556ec…

MALICIOUS

PDF

38.7 KB Created: 2020-08-23 20:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 729ab0559de475b5e785a2cec3a9b4e0 SHA-1: 94575fa83f8d6b38eb11cffddc12b8c4bbdccbd3 SHA-256: ffd142107f8556ec164a77fc63ab360c475231721773d75b6c11269aacf3700e
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=mplab+hitech+c+compiler+free'. Additionally, it exhibits a PDF link farm heuristic, indicating an attempt to distribute or obscure malicious links through numerous embedded URLs, many hosted on Shopify. The document body contains garbled text but includes the same suspicious URL and several Shopify-hosted PDF links, reinforcing the lure. The primary intent appears to be redirecting the user to malicious infrastructure.

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.ru/pify?keyword=mplab+hitech+c+compiler+free
    • http://nesobowu.artloversmovement.com/uploads/1/3/1/3/131379117/2648161.pdf
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/6594562416.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/51255002291.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/bimumisegaxiruwekupa.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/10333270052.pdf
    • https://cdn.shopify.com/s/files/1/0429/7805/0201/files/nukifukusovegolekeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/7497/7945/files/reforukogatudevuzukibeme.pdf
    • https://cdn.shopify.com/s/files/1/0436/6221/3270/files/70740573088.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6672/files/character_types_worksheet_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/8706/8322/files/seposotutu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/social_studies_culture_worksheets.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_off00005860.bin
94ae5530955bce0cecc354486b0008b3ca4c4c68f494180878601ae517512fb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5860 5220 bytes
font_01_sfnt_off00006a00.bin
9fb366d9589e5dea2838183be21efca1df76201815126bba99b8c82a8bd03d99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A00 10664 bytes

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