Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa7d67b47760b0d…

MALICIOUS

PDF

65.9 KB Created: 2020-07-30 05:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60b5bbb7b71bc5248f86927a773f81ab SHA-1: 82c4ecc788bd1724f613f8662d0cbe68918ef471 SHA-256: 8aa7d67b47760b0d72d268a511264ddf4fe3faeefdb73ab7f330c45c9abb6aa3
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=java+8+features+tutorial+the+ultimate+guide+pdf+download%2529', is flagged as a known malicious redirector. The document body is heavily obfuscated and appears to be generated content rather than user-readable text, further supporting the malicious intent of the link farm.

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=java+8+features+tutorial+the+ultimate+guide+pdf+download%2529
    • http://files.friendshiptoday.org/uploads/1/3/1/4/131437253/6250988.pdf
    • http://files.andrewlawlorphotography.com/uploads/1/3/1/3/131383319/7aa18bf9.pdf
    • http://files.stpaulconsortium.com/uploads/1/3/0/9/130968988/susizawozemozuxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/pawoduxog.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/99042218939.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/lagukiwekalogikoboz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87294954422.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/28570775201.pdf
    • https://cdn.shopify.com/s/files/1/0437/6995/4456/files/sujuluxigidorajuzi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/fikisod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30617095305.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdf
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/tuvadalezuri.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_off00009faa.bin
1079042a9f03b6b19237232f166216d4db61110b9243cb19935f5b1d60acb576		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FAA 5748 bytes
font_01_sfnt_off0000b32f.bin
0957b359f3d4561d0a294477e0e2cbf08b4abdf09dec3ba328ce6bef40146f34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB32F 15552 bytes
font_02_sfnt_off0000e4a9.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A9 16092 bytes

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