Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ab9d844f7ebea09…

MALICIOUS

PDF

36.6 KB Created: 2020-08-31 09:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73d1b79090f76768f32e5d1ac02bcab8 SHA-1: de4c4159d67d5a8ec3815ea8a5828812793cfcd8 SHA-256: 1ab9d844f7ebea0943e19e3a110b0e8b67b96fc3cc84cea1e501450da86205fb
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=how+to+draw+superheroes+book'. This URL is presented within the document body, suggesting a social engineering lure to trick users into clicking it. The file also contains a large number of embedded links, many pointing to Shopify, which is flagged as a link farm. The primary malicious IOC is the redirector URL.

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=how+to+draw+superheroes+book
    • https://cdn.shopify.com/s/files/1/0432/7525/5972/files/27190559948.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/61386238546.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/tadetodiwozukusofobap.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/megol.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/80416044078.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zaxolaxowixinetubosi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8137/5648/files/data_mining_concepts_and_techniques_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/9744/7836/files/canary_tokens.pdf
    • https://cdn.shopify.com/s/files/1/0429/6835/0873/files/gukowexasikowajipopamis.pdf
    • https://cdn.shopify.com/s/files/1/0440/3943/8501/files/factorio_guide_2018.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/kakugosunilawapasufowadi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/anglies_dioksido_formule.pdf
    • https://cdn.shopify.com/s/files/1/0433/4678/8501/files/nujugonulevupogibijufu.pdf
    • https://static.usrfiles.com/ugd/9dda13_048a05c1d4494694997800814c70b35b.pdf
    • https://static.usrfiles.com/ugd/b8c837_14f1dd89131c460bb4c0268c1c5dedf3.pdf
    • https://static.usrfiles.com/ugd/906e9f_b3cb9950112c46898038960bee2877c3.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_off0000526f.bin
de8ba4486140d2be948dc84e090b43499b5498a2d8c9030412a0d04da0a5aa4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x526F 5272 bytes
font_01_sfnt_off0000645a.bin
a6440681953804a1f76b24bd9ecd2edcac3d0837a263fa3de11be33ca930bc94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x645A 9680 bytes

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