Malicious PDF — malware analysis report

Static analysis result for SHA-256 9043518bbf3011cf…

MALICIOUS

PDF

45.5 KB Created: 2020-08-09 05:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 777513ae022581deecc92ce026602044 SHA-1: 0e827f95d134778e1fac7dc406995f53fe1a78e9 SHA-256: 9043518bbf3011cf2f14b5e42e31f7beb979b76df87fc9dd0ae55761e83aa329
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector at 'https://ttraff.ru/pify?keyword=aspergers+test+for+adults+pdf'. Another critical heuristic identified a PDF link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=aspergers+test+for+adults+pdf
    • http://files.saxtonairductcleaning.com/uploads/1/3/0/8/130814676/f847463.pdf
    • http://fegok.rasrimarketing.com/uploads/1/3/1/4/131406082/lolenad.pdf
    • http://files.enricahandwoven.com/uploads/1/3/2/6/132695306/dcf83a.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/32795914697.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/41004649559.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/lagato_carpet_tiles.pdf
    • https://cdn.shopify.com/s/files/1/0441/1670/5432/files/peragimirojefezusub.pdf
    • https://cdn.shopify.com/s/files/1/0433/9082/8700/files/78494641194.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6238/files/98242438515.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/91531039599.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/90299438323.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/bosupokuluv.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/vufutefajeruzuzisubiroju.pdf
    • https://cdn.shopify.com/s/files/1/0430/3038/0698/files/81732831698.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/pexumafopebejo.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_off00007341.bin
af1bd3ab6b6d8324ecefd9eae562e68877996865db5caf1da57b45d3d7925852		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7341 5200 bytes
font_01_sfnt_off00008501.bin
94e2bff74d41c1614c2025189b8f5e359508e2926077971d4a5ff5461e1bd7f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8501 10624 bytes

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