Malicious PDF — malware analysis report

Static analysis result for SHA-256 af7938f08ba1cb76…

MALICIOUS

PDF

38.5 KB Created: 2020-08-31 05:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89cb1b808f18f16119f52fad3a54a29d SHA-1: 974e9f119bdf63883aa9961215575572c69450fd SHA-256: af7938f08ba1cb76fa2fceaa65d09fcb1e96ccfc35ac36122172e8e1b2836e27
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, which is characteristic of a link farm. One critical heuristic identified a link to a known malicious redirector, 'ttraff.link', which is the primary indicator of malicious intent. The document body contains the same URL, suggesting it's the intended lure. The presence of a link farm and a malicious redirector indicates a likely phishing or malware distribution attempt.

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.link/wix?keyword=utada+hikari+mp3
    • https://cdn.shopify.com/s/files/1/0438/2880/5789/files/govedu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/cassia_tora_medicinal_uses.pdf
    • https://cdn.shopify.com/s/files/1/0440/2606/9157/files/relays_used_for_transformer_protection.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/adding_and_subtracting_rational_numbers_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3644/1767/files/84982312362.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/71244272030.pdf
    • https://cdn.shopify.com/s/files/1/0437/3626/8949/files/brave_for_windows_32-_bit.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/automatic_door_bell.pdf
    • https://cdn.shopify.com/s/files/1/0431/5096/6950/files/82544515010.pdf
    • https://cdn.shopify.com/s/files/1/0437/1238/1079/files/pufug.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/27_rules_of_subject_verb_agreement.pdf
    • https://static.usrfiles.com/ugd/e2f197_b022f6e3f3de4059ba232c853d0d5248.pdf
    • https://static.usrfiles.com/ugd/b8c837_9697dd7740e74475badebf05d2c73e82.pdf
    • https://static.usrfiles.com/ugd/b8c837_9484169f27cb4bb9ba43388afdc33d1b.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_off00004def.bin
d556cdba9aad2543ce14e0bec30adfb72758f2b02d9a352f72c1c57acfa35c26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DEF 3080 bytes
font_01_sfnt_off000058ef.bin
13ddc1f8a35cb12608a53424e1e115883c20af00117cdd8a9943bfbb037bd271		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58EF 5208 bytes
font_02_sfnt_off00006a83.bin
d11a5854a4f472800680c80013cef64f272e8360ee7b6d459f911cbf2abeceb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A83 10100 bytes

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