Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4c425180bccb7c6…

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 15:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61972baae22ac731b0041d25225bc7f3 SHA-1: 8ea3d28fe1cb221dfb5871fedded43a8a39918d0 SHA-256: a4c425180bccb7c6cbaba5e0810f80109621359bc42bdc969591277821c66e64
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the URL that leads to the malicious redirector. This suggests the primary goal is to redirect the user to a malicious site, likely for further exploitation or phishing. 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/wix?keyword=carboxylic+acid+reacts+with+water+to+form
    • https://cdn.shopify.com/s/files/1/0439/0069/8792/files/99054593429.pdf
    • https://cdn.shopify.com/s/files/1/0433/5396/4712/files/29679827009.pdf
    • https://cdn.shopify.com/s/files/1/0432/1493/0084/files/chromecast_pictures_locations.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0245/files/hero_quest_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/rusoxar.pdf
    • https://cdn.shopify.com/s/files/1/0437/1572/3414/files/99723414725.pdf
    • https://cdn.shopify.com/s/files/1/0437/4344/5141/files/vorelaxaruminirip.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/99649976342.pdf
    • https://cdn.shopify.com/s/files/1/0440/5208/6934/files/o_saki_saki_song_video_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/61575690518.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0775/files/the_best_answers_traduo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5805/2763/files/xetoxekivet.pdf
    • https://cdn.shopify.com/s/files/1/0461/6083/8808/files/baby_girl_announcement_card_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/nutabib.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_off00005d4b.bin
e684486cc7c354705af850dc0bc5866f152b19b117e9f83c38df6e47f64c68fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4B 5568 bytes
font_01_sfnt_off00007027.bin
f059fe5ea0aa52ed4e83e9e28fd994dcd7310d57c30c121bfe1c720230dd6821		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7027 11572 bytes

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