Malicious PDF — malware analysis report

Static analysis result for SHA-256 881da6515d60e6df…

MALICIOUS

PDF

120.1 KB Created: 2020-07-31 14:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 930dc1f856046a2d40bf27ce1ccd7b2b SHA-1: b0602c8dbcb0f5ba9d4786044af7471ab6ec164e SHA-256: 881da6515d60e6df66b4f1c95fdca8f105b471704edac948ebee933c816ef3da
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, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be related to SEO and PDF files, suggesting a link farm or SEO poisoning tactic. The primary goal appears to be directing users to malicious external sites.

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=albedo+anthropomorphics+pdf
    • http://files.wffanhub.com/uploads/1/3/0/8/130873895/9f8a73c0eed26e8.pdf
    • http://files.sustainablemanagement.ca/uploads/1/3/1/8/131871740/komebezufebigalo.pdf
    • http://files.tasteoftheseaport.org/uploads/1/3/1/4/131453393/d183a.pdf
    • http://files.nepscholarshipfund.com/uploads/1/3/2/7/132710628/5030960.pdf
    • http://files.growing4hisglory.com/uploads/1/3/0/7/130776887/970428.pdf
    • https://cdn.shopify.com/s/files/1/0434/0593/4757/files/51578852812.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5770/files/64823951401.pdf
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/19197041876.pdf
    • https://cdn.shopify.com/s/files/1/0437/0874/3835/files/88524950587.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1793/files/zubed.pdf
    • https://cdn.shopify.com/s/files/1/0437/3879/2085/files/31917010592.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/kigenijivad.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3406/files/73211535461.pdf
    • https://cdn.shopify.com/s/files/1/0433/3171/5225/files/97921477564.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2243/files/mepomuwixasodovipo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/55777320270.pdf
    • https://cdn.shopify.com/s/files/1/0439/8009/5646/files/jinagiwetipof.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_off00018c2b.bin
2dafa44193317cdc3358ee40f5e4e279e0c19903a768c1897af288e66f20bdfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18C2B 4016 bytes
font_01_sfnt_off00019a64.bin
4366a6984d68ea1704653e2123215ce5c40859d4eecbedeed45db72e77adfa96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19A64 5312 bytes
font_02_sfnt_off0001ac2c.bin
d6ad61acca27617410aed1eb85b1d4ec97c4ac4ac5782be88d2caa23718cdf58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC2C 11736 bytes

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