Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b214689d4da4f2…

MALICIOUS

PDF

47.6 KB Created: 2020-09-04 03:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2babca2ff3ec441c0bed3ac70076840 SHA-1: 3c467cf5637d27e25e210380ac765d1969481b25 SHA-256: a3b214689d4da4f239b0a40b3e3f7e40c6f5f4f1b7f5fb83ed96dbcc27e538a7
130 Risk Score

Malware Insights

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

The PDF file contains a SE_INVOICE_LURE heuristic, indicating it is designed as a fake invoice or payment lure. It also contains a PDF_MALICIOUS_REDIRECTOR_LINK heuristic pointing to 'https://ttraff.link/wix?keyword=problem+statement+template+in+research', which is a known malicious redirector. The PDF_SEO_LINK_FARM heuristic indicates a mass of external links, with the first being 'https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.pdf'. The document body, though heavily obfuscated, contains these URLs, suggesting the primary attack pattern is to lure the user into clicking a malicious link.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=problem+statement+template+in+research
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.pdf
    • https://cdn.shopify.com/s/files/1/0438/4771/2928/files/different_concrete_mix_ratios.pdf
    • https://cdn.shopify.com/s/files/1/0432/6627/7531/files/nedeja.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/ziworuvumopafif.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7967/files/57717008456.pdf
    • https://static.usrfiles.com/ugd/b8c837_8be2c0c2f518427cae1aabbd2899cc09.pdf
    • https://static.usrfiles.com/ugd/7f46b5_7ad44e749fbf459ebeb5044e3ed1e5b2.pdf
    • https://cdn.shopify.com/s/files/1/0433/8581/5190/files/postscript_cecelia_ahern.pdf
    • https://cdn.shopify.com/s/files/1/0431/3671/2861/files/53757955077.pdf
    • https://cdn.shopify.com/s/files/1/0461/5392/4771/files/35190913978.pdf
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/78072781663.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/hawke_cable_gland_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0435/2360/4631/files/95967056140.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_off00006ed8.bin
767a6598919f45e5e41cb7b1c95e2c88c953b55e8be4c0e6fd510f4dd61ed37e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED8 5100 bytes
font_01_sfnt_off00007fe5.bin
b89d4fc67cccbfc448165cadbeabe277e73867c3642a24a05969cf501fe96cbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE5 10420 bytes
font_02_sfnt_off0000a36c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA36C 4324 bytes