Malicious PDF — malware analysis report

Static analysis result for SHA-256 7da139870d33e8b6…

MALICIOUS

PDF

45.0 KB Created: 2020-08-11 23:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 483f5f7c1d1457f893219200a899426b SHA-1: d5860c7452df392757c698c87a207f94b2647750 SHA-256: 7da139870d33e8b63a4e13216ff7a831e18a71da8d9fd9c512009d8e383e9f62
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector at 'ttraff.ru'. This indicates a link farm or redirection tactic designed to obscure the ultimate destination and potentially lead users to malicious content. The presence of the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics strongly supports this attack pattern. No scripts were extracted from this sample.

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=nucleophilic+and+electrophilic+substitution+reaction+pdf
    • http://files.legacycockapoos.com/uploads/1/3/1/3/131379057/lopevaxameket_vurika_japofebuj_fejad.pdf
    • http://files.the-learning-agency-lab.com/uploads/1/3/1/1/131163943/rofin.pdf
    • http://files.ghoddousi.com/uploads/1/3/1/3/131379820/1424354.pdf
    • http://files.milwaukeecharteradvocates.org/uploads/1/3/1/4/131452840/fekobagedetip-rujegajobe-tibuz-zubonafanewuwi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/godokalebalexivus.pdf
    • https://cdn.shopify.com/s/files/1/0436/3105/0905/files/gentleman_s_dignity_eng_sub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/rufepuxekelunexajamagedan.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6023/files/tajiruxafadapebaki.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/kohler_a112._18._1_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/josunexod.pdf
    • https://cdn.shopify.com/s/files/1/0433/1647/8110/files/print_webpage_to_without_ads.pdf
    • https://cdn.shopify.com/s/files/1/0432/4176/7072/files/78947696854.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1642/files/cauchy_schwarz_inequality_problems.pdf
    • https://cdn.shopify.com/s/files/1/0444/0725/9302/files/bournemouth_town_centre_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/pobejapimitowux.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_off00007090.bin
62d3315bf34a1ddf8d4961a63414658b4792dd62a86c3ba3f29aa7ce1810a3a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7090 5352 bytes
font_01_sfnt_off000082ad.bin
bd4bec392de5bbc0977cd4340d79ddfdb4553440f0fa02a5b35a02eea45b42c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82AD 10392 bytes

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