Malicious PDF — malware analysis report

Static analysis result for SHA-256 da39e31d6abf6ace…

MALICIOUS

PDF

46.4 KB Created: 2020-08-09 05:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8164781b68b08d56c7290b5eb896599a SHA-1: 713b88cfe20bac3e87232e709aa78bb482621d80 SHA-256: da39e31d6abf6acee44e6a31ba45104fb1980a56738a80171c8ace361cf66fe0
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to external PDF files hosted on various domains. One primary URL, 'https://ttraff.ru/pify?keyword=yajur+veda+pdf+in+gujarati', is flagged as a malicious redirector. The document body, though partially corrupted, contains metadata and the primary URL, suggesting a lure to external content. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or redirection attempt.

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=yajur+veda+pdf+in+gujarati
    • http://files.michellevanlare.com/uploads/1/3/1/4/131407901/42e69.pdf
    • http://files.churchofgodfaithfellowship.com/uploads/1/3/1/4/131453733/2580756.pdf
    • http://files.taxesrussxm.com/uploads/1/3/1/3/131380601/6ab8bd6b643.pdf
    • http://files.tipdi.com/uploads/1/3/1/3/131380966/parazabavik-texavunomav.pdf
    • http://files.brice-williams.com/uploads/1/3/0/8/130874526/8139150.pdf
    • https://cdn.shopify.com/s/files/1/0432/6440/9764/files/dexonerumusetizuniba.pdf
    • https://cdn.shopify.com/s/files/1/0431/0758/2106/files/82060790695.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/jafekisulozere.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/zakaguzekadokifibamam.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/74539767813.pdf
    • https://cdn.shopify.com/s/files/1/0439/1940/9320/files/ispad_guidelines_dka_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/9324/4570/files/insinkerator_pro_333.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/vegoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojezurin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9868/6111/files/98982635997.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/lakefuwez.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005905.bin
5f949192384fdd42d0b87dba2ecc8b1bd2e56906decb4e4d1a63b16fc3e97075		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5905 5096 bytes
font_01_sfnt_off00006a7e.bin
8545992bcba4dadbcb041c327151dcd87fe5ba329b18307350ad4410711b2144		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7E 5888 bytes
font_02_sfnt_off00007dae.bin
9306dc1eb6d7137e6163bf3ed803eb49b0367bfaac9708618eb445c804c771bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAE 10332 bytes
font_03_sfnt_off0000a133.bin
520ed618973a749f1ed936d38fd116b4861750fc5982d1d6f52c4cec5cf3f9f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA133 2684 bytes

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