Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c3b4b4fb442155…

MALICIOUS

PDF

40.1 KB Created: 2020-08-18 23:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe53509eb74cdffa2edc11632c71447d SHA-1: 7c4b8d9b8e5d757b2a2f6d1d8663fb6f3d6c05a7 SHA-256: 79c3b4b4fb442155ae606c45d519bf320b24f8243c4933d7a5d41dab035799bc
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily corrupted, contains the text 'Cross check torque seal datasheet' and the URL, suggesting a lure to trick the user into clicking the link. The presence of numerous other links to shopify.com PDFs indicates a link farm technique to improve search engine ranking and visibility for 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=cross+check+torque+seal+datasheet
    • http://files.aschaxel.com/uploads/1/3/1/6/131637043/3430468.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/26207254187.pdf
    • https://cdn.shopify.com/s/files/1/0431/2485/0842/files/28755328109.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1957/files/saurashtra_university_b._com_sem_1_books.pdf
    • https://cdn.shopify.com/s/files/1/0436/5916/5849/files/23112232931.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/anton_calculus_8th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/larval_acid_classic.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61086590007.pdf
    • https://cdn.shopify.com/s/files/1/0438/6082/0133/files/29566343195.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2584/files/zukukebovegolidawozipilod.pdf
    • https://cdn.shopify.com/s/files/1/0434/7789/3270/files/xexarodatasosititavawurul.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/mezobidepirazi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6099/9845/files/beelink_j45.pdf
    • https://cdn.shopify.com/s/files/1/0435/0980/9318/files/quick_sort_in_python.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_off00005093.bin
3fc6505a1a41a35981102f90b3653ae8c47e8fcae00ff3b39d28011828351965		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5093 4968 bytes
font_01_sfnt_off0000618a.bin
2083656a034ed171a2c40ce1b3519251a8158d27901eb56bda2b34612ced1860		 pdf-font-stream PDF embedded font (sfnt) at offset 0x618A 10484 bytes
font_02_sfnt_off0000857a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x857A 4324 bytes

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