Malicious PDF — malware analysis report

Static analysis result for SHA-256 7973fb2a4a93e6cd…

MALICIOUS

PDF

40.1 KB Created: 2020-08-12 10:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50d8ced65895b89a7e71b1ed175a5b5e SHA-1: 43c7e42d1367b4035446488aa293b2579c359457 SHA-256: 7973fb2a4a93e6cde950f7f412d452527bc9bc17eaea47b5e4d02c37cd5a3b22
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains references to the malicious URL, suggesting an attempt to lure users to a compromised site. No scripts were extracted from this sample.

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=zbrojownia+starego+%25C5%259Bwiata+pdf+chomikuj
    • http://files.rsdtech.org/uploads/1/3/2/8/132815854/poverav.pdf
    • http://duxowa.thebelleblog.com/uploads/1/3/1/4/131453267/nuvisijija.pdf
    • http://files.equinoxsupplements.co.uk/uploads/1/3/1/3/131381607/9062126.pdf
    • http://files.railwayterraceselfcatering.com/uploads/1/3/0/7/130739648/7708989.pdf
    • https://cdn.shopify.com/s/files/1/0428/9118/2243/files/66089999249.pdf
    • https://cdn.shopify.com/s/files/1/0433/8178/4726/files/3ds_max_tutorials_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0434/0537/7701/files/joxuwabanesisaze.pdf
    • https://cdn.shopify.com/s/files/1/0438/0937/4368/files/cooking_calc_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0431/4103/8229/files/fasagubodizelufonife.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/wii_drum_sets.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/4046576127.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9348/files/hinduism_religion.pdf
    • https://cdn.shopify.com/s/files/1/0429/3771/2806/files/bible_study_plan_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/1543/0553/files/gewixujuniveku.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/89061612225.pdf
    • https://cdn.shopify.com/s/files/1/0432/9078/8000/files/74498992213.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_off00005cbc.bin
d4fb9c27ebf247005f09c632bccef4831accdaa7a6ab1bca32035267b3ead66c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBC 6068 bytes
font_01_sfnt_off000070d8.bin
d9a57d5a4268316540d3803d82fe14a545642b17501f57281ab7ac46877a6c70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D8 10404 bytes

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