Malicious PDF — malware analysis report

Static analysis result for SHA-256 22da7b2ca07846a2…

MALICIOUS

PDF

42.6 KB Created: 2020-08-06 21:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5491379117706ebfccfa64631cc71eab SHA-1: b43967e31603d775ce20438c292888bb1f3644d3 SHA-256: 22da7b2ca07846a2fab302629fb37cfa5c72fdc35a0644c291fb7df72fc318a2
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, https://ttraff.ru/, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the redirector URL and the shopify links, suggesting a lure to drive traffic to malicious infrastructure. No scripts were extracted, limiting the analysis to the PDF structure and embedded URLs.

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/wb?keyword=most%20common%20english%20words%20with%20arabic%20translation%20pdf
    • http://files.michellexiao.net/uploads/1/3/1/6/131607346/xugex-xotosuzunixovir-kuvareduxifo-fufetatarifu.pdf
    • http://files.changingfutures.org.uk/uploads/1/3/1/6/131606087/mufegesitawiko-matuwomap-xivekun-vokozufeletefuz.pdf
    • http://files.townofeileen.org/uploads/1/3/0/9/130969960/toludajajam_dufaja_miwibedub.pdf
    • http://files.hopeandhealtherapy.com/uploads/1/3/1/1/131163617/f337c30758a39.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0762/files/sijibobobasawowanepepukan.pdf
    • https://cdn.shopify.com/s/files/1/0438/4659/8821/files/pisogulivowurakon.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/kukofopowefav.pdf
    • https://cdn.shopify.com/s/files/1/0437/6641/5514/files/tugogitaduwotisaxuvuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/dapinoxekuzikefi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/rijag.pdf
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/bivariate_lognormal_distribution.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/the_dapper_prodigy.pdf
    • https://cdn.shopify.com/s/files/1/0448/5169/1680/files/halo_2_gravemind.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/dagerizuzojavigejorip.pdf
    • https://cdn.shopify.com/s/files/1/0433/5602/9093/files/bozuxawowumi.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_off00006636.bin
711dce722fecb03273655ca205ab1c3f49b62754209d92947848b335bfc7ada8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6636 5804 bytes
font_01_sfnt_off000079e5.bin
88fbb482f9af0ee0e1323981561168d0d289a5846015120dc9240426544379a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E5 10328 bytes

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