Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cdb250af46a75e3…

MALICIOUS

PDF

36.5 KB Created: 2020-08-15 18:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73df0237d9c62bd82e90ed3e79c8aeda SHA-1: d23b5201fe4cf5a99f4e47b2732dbd94fd17377e SHA-256: 8cdb250af46a75e339c745534edf8c1ec476ceb0ede81e366670b361065d8e92
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains this URL and other embedded URLs, suggesting a lure to external content. The presence of a link farm heuristic further indicates an attempt to manipulate search results or distribute malicious links.

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/wb?keyword=karcher%20k7%20service%20manual
    • http://files.lockmangenetics.com/uploads/1/3/0/7/130775383/nizejab.pdf
    • https://cdn.shopify.com/s/files/1/0440/1473/1414/files/applied_mathematics_123_key_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/cast_of_the_movie_shooter.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/microsoft_office_product_key_2019.pdf
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/4084299333.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/29317902894.pdf
    • https://cdn.shopify.com/s/files/1/0431/2354/0124/files/59028774958.pdf
    • https://cdn.shopify.com/s/files/1/0439/4024/9755/files/certyfikat_kompetencji_zawodowych_testy_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/4800/8866/files/the_impact_of_cashless_banking_system_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0432/4750/1474/files/advanced_mathematics_solved_problems.pdf
    • https://cdn.shopify.com/s/files/1/0440/9724/1240/files/sabuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7985/files/92488903375.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046d7.bin
bd7a8a286752ad6b1e21071b964db84f5d5505f2854ee9229e57ca6d199bfe83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46D7 4904 bytes
font_01_sfnt_off0000574f.bin
89d7375538dba0851f5988bd86760e5fdbd1b4db2746f329d18c356194b27b6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x574F 9376 bytes
font_02_sfnt_off0000775a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775A 4324 bytes

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