Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f210eaaeaa5b90…

MALICIOUS

PDF

47.5 KB Created: 2020-09-09 04:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bbe380034cf51fe09320850c65ff336 SHA-1: bfb53ac06444fe5d0fc4d5b9def558e0c7eb4c8b SHA-256: 85f210eaaeaa5b902c29ed77dc5e61da7dcf3428e1e65250eb0524eb02e590f6
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a URL designed to lure users with an 'apple ipad mini software' keyword. The document body, though heavily obfuscated, also contains this URL and other benign-looking PDF links, suggesting a link farm or redirection strategy. The primary intent appears to be directing users to malicious infrastructure via the identified redirector.

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.link/pify?keyword=apple+ipad+mini+software
    • https://static.usrfiles.com/ugd/11276f_d6190ef54e9b49f58ae17762e2b39919.pdf
    • https://static.usrfiles.com/ugd/ca300b_c928b2deece340a2a47d8a8f61c5bf80.pdf
    • https://static.usrfiles.com/ugd/0c41e7_de0ddf9f398d421aaf490a10659e88d7.pdf
    • https://cdn.shopify.com/s/files/1/0429/3384/6183/files/7th_grade_constitution_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/6694/8773/files/ajay_yadav_anesthesia_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/liu_kang_fatality.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesitoxerevujadutag.pdf
    • https://cdn.shopify.com/s/files/1/0462/1228/4570/files/animal_kingdom_showtimes_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/2151/6448/files/manual_chest_physiotherapy_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0432/6726/0582/files/86130432035.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulexukiwogefera.pdf
    • https://cdn.shopify.com/s/files/1/0458/1192/5158/files/ppt_template_flower_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/tale_of_three_kings.pdf
    • https://cdn.shopify.com/s/files/1/0431/4605/1744/files/rosary_guide_kapampangan.pdf
    • https://cdn.shopify.com/s/files/1/0437/8542/0949/files/gofajewajimube.pdf
    • https://cdn.shopify.com/s/files/1/0434/4388/0093/files/dededoxonegugerug.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_off00007934.bin
489510f6659a4aec5f94c806d2844bda959829f5a217394512122944722084c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7934 5268 bytes
font_01_sfnt_off00008b1e.bin
7729f0bad7614ffcca13e6796e4193d020ba610420745e159ca5867a615491fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1E 11276 bytes

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