Malicious PDF — malware analysis report

Static analysis result for SHA-256 444d63fef5669aa4…

MALICIOUS

PDF

41.8 KB Created: 2020-08-21 02:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6840b042aa77488c4c84f9f079017283 SHA-1: 32d301c2e6d56e5e3dd74cfab5885f72f6a90863 SHA-256: 444d63fef5669aa45b72c630d1708529fa4889dea05584f8f42df6247a6cb64d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to a known malicious redirector infrastructure at `ttraff.ru`. The document body, though heavily corrupted, contains a reference to this same URL, suggesting it is the primary malicious payload delivery mechanism. The presence of numerous Shopify links, while many are confirmed benign, likely serves to obscure the malicious link within a larger 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=translate+algebraic+expressions+worksheet+with+answers+pdf
    • http://fevovi.mearfest.org/uploads/1/3/2/6/132695569/8613757.pdf
    • http://files.graysong.com/uploads/1/3/0/7/130739480/8824830.pdf
    • https://cdn.shopify.com/s/files/1/0434/1668/2663/files/68303580241.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/lajuzevipiwer.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/nilagekaxojaganizijo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4277/files/espresso_english_3.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4121/files/27240433325.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/the_right_swipe_alisha_rai_epub.pdf
    • https://cdn.shopify.com/s/files/1/0452/2174/0701/files/dead_by_daylight_free_laptop.pdf
    • https://cdn.shopify.com/s/files/1/0435/5116/2523/files/bodukabopusivizinev.pdf
    • https://cdn.shopify.com/s/files/1/0429/6369/7817/files/cfa_level_1_study_material.pdf
    • https://cdn.shopify.com/s/files/1/0437/6467/8817/files/soul_worker_haru_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69892687871.pdf
    • https://cdn.shopify.com/s/files/1/0438/1271/6701/files/mipum.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_off00006466.bin
9049556485412dfed66118151b63daa0d4bb7c9ee3f0eaf86ba2255c2d6fe640		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6466 5732 bytes
font_01_sfnt_off000077ea.bin
c92446f3150cc969d146191b105f324f55a497a3d8d7c56ccfc59354ee6a7442		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77EA 10080 bytes

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