Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b50258b06de70dd…

MALICIOUS

PDF

34.7 KB Created: 2020-08-13 14:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ae30d2a630b0d844eb9fc24fbda8f19 SHA-1: cf50dc3a9f9c067cc05731da299654452504ec4b SHA-256: 7b50258b06de70dda920da207187d736116129a2da3abe24d69ddf85b0516da9
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one primary redirector URL. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the primary URL, 'https://ttraff.com/pify?keyword=algebra+2+prentice+hall+mathematics+pdf', leads to malicious infrastructure. The document body, though heavily obfuscated, contains references to the redirector and other PDF links, suggesting a lure to download further malicious content.

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.com/pify?keyword=algebra+2+prentice+hall+mathematics+pdf
    • http://files.juliawebberforeanes.com/uploads/1/3/2/7/132740606/0d19cc1.pdf
    • http://files.gilfordphysicaltherapy.com/uploads/1/3/2/6/132683334/5158343.pdf
    • http://files.hameeha.com/uploads/1/3/1/0/131069899/pitabevag-gixoxafubutujux.pdf
    • http://zerabutud.pinecrestplayers.com/uploads/1/3/1/8/131855981/ea3c714ac1d.pdf
    • http://files.ctforkids.com/uploads/1/3/0/7/130739898/3443226.pdf
    • https://cdn.shopify.com/s/files/1/0436/2859/3315/files/87669653387.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7252/files/83838506796.pdf
    • https://cdn.shopify.com/s/files/1/0440/4035/6005/files/15844542217.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4838/files/92788930365.pdf
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/jiweridasofidisiwala.pdf
    • https://cdn.shopify.com/s/files/1/0430/8022/0823/files/allan_kardec_libros.pdf
    • https://cdn.shopify.com/s/files/1/0454/1018/9480/files/speaking_worksheets_for_esl_students.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/align_image_center.pdf
    • https://cdn.shopify.com/s/files/1/0436/2623/4009/files/43261410145.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/69611660379.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8213/files/pulmonary_complications_after_cardiac_surgery.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/kuwefa.pdf
    • https://cdn.shopify.com/s/files/1/0436/0817/8850/files/playhouse_instructions.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_off000048d6.bin
a022e4347caa73e5fad74356eb2cff466ae708dc2a51bd151bf376b18a55d519
pdf-font-stream PDF embedded font (sfnt) at offset 0x48D6 5828 bytes
font_01_sfnt_off00005c75.bin
93c68e9e444777b8ca75ce7a8a42e72e6e2feb4dbe44b52c7d06d133df603090
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C75 9708 bytes