Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff10a2fe229fd356…

MALICIOUS

PDF

42.8 KB Created: 2020-08-31 00:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f1628943c14c3b7a2a5c781b95e195d SHA-1: b40eb5221379088a0fe196239c8ed2df9895f4a9 SHA-256: ff10a2fe229fd3564d270d70ccaca4095e4d04fdf9c612be2db3ace37d44a22e
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body and embedded URLs suggest a lure related to software installation or updates, specifically mentioning 'uninstall adobe acrobat reader dc ma'. The primary malicious IOC is the redirector URL, which likely leads to further stages of the attack.

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/wix?keyword=uninstall+adobe+acrobat+reader+dc+ma
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/80431534632.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1813/files/72771982046.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3931/files/wuxitoxajanav.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/66113503406.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7469/files/npm_copy_files.pdf
    • https://cdn.shopify.com/s/files/1/0435/4198/7479/files/9257597648.pdf
    • https://cdn.shopify.com/s/files/1/0431/1652/7770/files/vujiliw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3993/9994/files/reporter_salary_singapore.pdf
    • https://cdn.shopify.com/s/files/1/0428/1729/0407/files/85980966047.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2436/files/feregopiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/2362/9477/files/sevizezepaget.pdf
    • https://cdn.shopify.com/s/files/1/0429/1955/9335/files/xufaketetuxejunigaza.pdf
    • https://cdn.shopify.com/s/files/1/0429/3545/1804/files/performance_scalability_load_testing.pdf
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/operation_research_taha.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/dimaro.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8474/files/the_bcmath_extension_is_required_by_numberformatter.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/30880403303.pdf
    • https://cdn.shopify.com/s/files/1/0437/3299/2161/files/ahsanul_fatawa_9_vols.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/bamut.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/
    • https://cdn.shopify.com/s/files/1/0431/3464/8474/files/the_bcmath_extension_is_required_by_numberformatter.pd

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dd1.bin
415fd6b8162e9df1c1fbddd376a436722a6375d73dcdc3c6d052b33020da813f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD1 5004 bytes
font_01_sfnt_off00006eaa.bin
9afdbe5fa00c1afeab9662fad4d907bc42f935a489e158c6d96908bfbe10d330
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAA 9564 bytes
font_02_sfnt_off00008f57.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F57 4324 bytes