Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0e832680e0026c…

MALICIOUS

PDF

43.3 KB Created: 2020-07-29 18:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9209a83765c562c9d2d9f40955a90f4f SHA-1: d2c162bb35d7ee93ed9a98dca49edd2d100305b3 SHA-256: ab0e832680e0026c24b3ce5242534fafca8debb5828e4830a0e72107e2aa4737
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO link farms and redirecting users to malicious sites. One such link, https://ttraff.ru/pify?keyword=adding+and+subtracting+integers+worksheets+pdf, is flagged as a known malicious redirector. The document body is heavily obfuscated, but the heuristics indicate a malicious redirector and a link farm strategy. No scripts were extracted, limiting the analysis of direct payload execution.

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=adding+and+subtracting+integers+worksheets+pdf
    • http://files.kariajohnson.com/uploads/1/3/1/8/131871701/8a18f3474e.pdf
    • http://files.wellness.org.sg/uploads/1/3/1/4/131437249/7598015.pdf
    • http://files.mckinneyquiltersguild.net/uploads/1/3/0/8/130874207/2449c3a58288a.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/nifevuxudopet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/balava.pdf
    • https://cdn.shopify.com/s/files/1/0433/8846/9398/files/fejababubiwedeluni.pdf
    • https://cdn.shopify.com/s/files/1/0434/0852/3416/files/74270711002.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.pdf
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/bagofatilubitezesi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9619/3686/files/57255530875.pdf
    • https://cdn.shopify.com/s/files/1/0434/1999/2222/files/78239221111.pdf
    • https://cdn.shopify.com/s/files/1/0438/4486/2114/files/65090568953.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95909873105.pdf
    • https://cdn.shopify.com/s/files/1/0431/2019/7789/files/38018283128.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a81.bin
c87fd060befa6df7f4513bbf710cef234d2624025a979a8cf5193dfc57a4fa57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A81 5552 bytes
font_01_sfnt_off00007d5d.bin
880ee75dfb5194e3fb7a83439c785d3a704452e7228f824e32a2e7958b8f2002		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5D 10064 bytes

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