Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae1d139bbfe5096…

MALICIOUS

PDF

40.3 KB Created: 2020-08-20 11:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b4376feda9d7c62da2e5b53dc69fdce SHA-1: de82a43058795a9419e208ec9f42266b48097911 SHA-256: bae1d139bbfe50967b5f848ef7db2db5bbffda9bc4bf8abefc99ec752dffa5f5
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body contains the URL https://ttraff.ru/pify?keyword=devour+barcelona+guide, which is identified as a malicious redirector. The presence of numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggests a coordinated effort to distribute malicious content or phish users. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=devour+barcelona+guide
    • http://lararuj.shennashepard.com/uploads/1/3/1/4/131406436/871b0b75fd7173.pdf
    • http://files.pollypanda.com/uploads/1/3/0/7/130739117/2827479.pdf
    • http://files.skinclinicpa.com/uploads/1/3/2/6/132695828/navifepi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/rotevawefifixokugugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/buxigol.pdf
    • https://cdn.shopify.com/s/files/1/0448/7577/6167/files/carnot_theorem.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/rockbox_ipod_classic.pdf
    • https://cdn.shopify.com/s/files/1/0430/6980/0597/files/52921042395.pdf
    • https://cdn.shopify.com/s/files/1/0428/8331/7926/files/wawawivulorebijowagi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0524/5597/files/ultrasound_guided_adductor_canal_block_sonosite.pdf
    • https://cdn.shopify.com/s/files/1/0433/5176/9247/files/dorux.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/defobuz.pdf
    • https://cdn.shopify.com/s/files/1/0439/1773/8152/files/83981881673.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/murisax.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1354/files/laluribukuwodavi.pdf
    • https://cdn.shopify.com/s/files/1/0436/7892/4953/files/cracking_the_sat_math_2_subject_test.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_off000060de.bin
bfccd969abb125aab5c2575a30e86c814abe63f68c29e77c5984f811b836e6e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60DE 5128 bytes
font_01_sfnt_off00007267.bin
fd7eceb09e970a77e22b81281fd91f0f0dc27eca84ff3baa70ce7a84f6e78c58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7267 9992 bytes

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