Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd1785d7f970005…

MALICIOUS

PDF

39.8 KB Created: 2020-08-17 17:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f932bf74967de8ff604eae64303c4fd SHA-1: d286156563a462103217e7d7b76c21d5a2b0b1d9 SHA-256: abd1785d7f970005778511306ab9b2551c25d492ec12f49e5ac0483a4fe8c994
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.cc/pify?keyword=interrogative+pronoun+worksheet+esl'. This URL is presented within the document body, disguised as an educational worksheet. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, likely to improve search engine ranking and distribute malicious content. 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.cc/pify?keyword=interrogative+pronoun+worksheet+esl
    • http://zowolino.gunfightersmc.com/uploads/1/3/1/4/131407995/xileb-jifimatevorikum-kerajigakamaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/9831/6707/files/83068793983.pdf
    • https://cdn.shopify.com/s/files/1/0435/7878/5951/files/english_conversation_lessons_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajovi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/dolce_amore_song_your_love_video.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/38461405656.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5680/files/lonely_planet_helsinki.pdf
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/41989268251.pdf
    • https://cdn.shopify.com/s/files/1/0430/6341/0845/files/2495473014.pdf
    • https://cdn.shopify.com/s/files/1/0448/1508/9825/files/budesufaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/nojifibaliji.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3904/files/79008011891.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_off00005501.bin
0b94856a60fa0ff9df8578be5294bc1c77098acf1c901b8e4630af9f187828aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5501 5236 bytes
font_01_sfnt_off000066e4.bin
3578fddeafa7c12809f997594289bfb3080045d9ff20136d85ddc60ed7a3fde8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E4 13156 bytes

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