Malicious PDF — malware analysis report

Static analysis result for SHA-256 519c6eb10aae7765…

MALICIOUS

PDF

40.1 KB Created: 2020-08-18 22:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94897ccf63f33b51eb88eb80c4de258c SHA-1: 616eed20f4650803c1bcff935f96b2024b02240b SHA-256: 519c6eb10aae7765bcd1a7a0c293aa717e23e5a843eb731b03d853882315a4c3
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.ru/pify?keyword=cursive+handwriting+sheets+a-+z'. This suggests the document is designed to lead users to malicious infrastructure. The presence of many external PDF links, including benign ones on Shopify, indicates a potential link farm or SEO poisoning tactic to increase visibility and lure victims. No scripts were extracted, but the primary attack vector appears to be the malicious redirection.

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=cursive+handwriting+sheets+a-+z
    • http://pubiv.samgevers.com/uploads/1/3/2/8/132814930/wujobavanigole.pdf
    • http://files.bioconnections.net/uploads/1/3/0/8/130813458/5712188.pdf
    • http://files.fernandojimenezphoto.com/uploads/1/3/0/7/130775868/tezafovibebami.pdf
    • http://fudasofur.nolankavanagh.com/uploads/1/3/2/3/132303382/2124149.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/75390854580.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/lazonodajarakijiwateju.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5654/files/wiwid.pdf
    • https://cdn.shopify.com/s/files/1/0432/8590/5576/files/java_spring_annotations.pdf
    • https://cdn.shopify.com/s/files/1/0429/5124/5987/files/tavezagikefesodeku.pdf
    • https://cdn.shopify.com/s/files/1/0430/7674/7413/files/video_games_advantages_and_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0436/2944/5273/files/xiwerumedulero.pdf
    • https://cdn.shopify.com/s/files/1/0438/2552/8989/files/caste_certificate_form_download_jharkhand.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1791/files/dodexoxepezibil.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/kuvawa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/jixutidedajolaxinow.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_off00005fb7.bin
2593e3579c7c3458194933f151497b4e6ca2b5ce0dd9ac2f2a68c4b39462fbcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB7 5192 bytes
font_01_sfnt_off00007180.bin
20077acb03c654f16df941f607b2ebf22aebc065a1211b383601582e8df6b5cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7180 10120 bytes

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