Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c390ce74d8400a8…

MALICIOUS

PDF

107.4 KB Created: 2020-07-31 23:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42f1d3568d7c6d50c5e4d388ad9426e8 SHA-1: 43fe44aa56e461130e6d0a29dae5fe03714c431b SHA-256: 8c390ce74d8400a8ab8223158ba7dd598aa48251a547fa7159222a79c89e4c8f
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=nikon+wu1a+manual'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded links to other PDFs hosted on various domains, including cdn.shopify.com. The overall intent appears to be directing users to malicious infrastructure under the guise of providing a product manual.

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=nikon+wu1a+manual
    • http://files.runningembers.com/uploads/1/3/1/4/131407818/1e8033.pdf
    • http://files.nicolefranz.com/uploads/1/3/1/6/131607269/7880543.pdf
    • http://files.spicecommunity.org/uploads/1/3/0/7/130776809/3104681.pdf
    • http://files.neonfactory.ca/uploads/1/3/0/7/130740130/rikoxanujuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/4655/1208/files/bizumunewakezigagazabozug.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/44251251777.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5081520916.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/36416418428.pdf
    • https://cdn.shopify.com/s/files/1/0437/5959/9765/files/rovexadereketur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdf
    • https://cdn.shopify.com/s/files/1/0429/6520/5141/files/66044594410.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/lalol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/28122928192.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.pdf
    • https://cdn.shopify.com/s/files/1/0434/8621/6344/files/12672787491.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/vokevezufabi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb1.bin
d2cd280d42aa80892ee071a99219f62ea450d2efc929c3dbf18730c148ebcec7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 33252 bytes
font_01_sfnt_off0001543a.bin
1dd6cc3004a4d21ad6748dc139736f4a1b6c734a16d049f8a26c6a7df99bb7e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1543A 4416 bytes
font_02_sfnt_off00016328.bin
c971d817e8eed9b12230ae0b5d353ba96284ec06b388adb3ebb771c0f64cfe14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16328 14696 bytes
font_03_sfnt_off000191e3.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x191E3 4324 bytes

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