Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a1894b4d455a11…

MALICIOUS

PDF

41.8 KB Created: 2020-08-31 11:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29fbd9f5c8346bbc84136a9f698f3e19 SHA-1: fab08479803f797abd54522870b1577a8588facd SHA-256: c2a1894b4d455a1150866b68fbfc1337a25454c143810dd55aa8dd3685888bf7
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO poisoning. One prominent link, however, directs to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the title 'Charisma on command: inspire, impres' and the malicious URL, suggesting a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=charisma+on+command%253A+inspire%252C+impres
    • https://cdn.shopify.com/s/files/1/0431/5018/0512/files/datefer.pdf
    • https://cdn.shopify.com/s/files/1/0434/2933/1100/files/75036721712.pdf
    • https://cdn.shopify.com/s/files/1/0430/2009/1555/files/wujetimabotirir.pdf
    • https://cdn.shopify.com/s/files/1/0462/7493/6994/files/aranmore_catholic_primary_school_uniform_shop.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/treble_clef_note_reading.pdf
    • https://cdn.shopify.com/s/files/1/0438/3876/7266/files/autotrophic_and_heterotrophic_nutrition.pdf
    • https://cdn.shopify.com/s/files/1/0439/3939/7790/files/82470044259.pdf
    • https://static.usrfiles.com/ugd/b8c837_7572e2f117564a1999f028e8622bbec6.pdf
    • https://static.usrfiles.com/ugd/345929_8ec320001a9344839ffe9c4340769456.pdf
    • https://static.usrfiles.com/ugd/0dd040_e97dfb7932a242a2b9b358bb2f166a04.pdf
    • https://static.usrfiles.com/ugd/08fe48_2d96cf7dc4144b408c8e89038cbcfc28.pdf
    • https://static.usrfiles.com/ugd/38bf1f_503d34529abc456397637f140ac1a9a6.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/john_f_kennedy_airport_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/daxadupudir.pdf
    • https://cdn.shopify.com/s/files/1/0437/0504/1051/files/89467638307.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/terodosim.pdf
    • https://cdn.shopify.com/s/files/1/0434/6612/9574/files/44622847024.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_off00005a96.bin
68d1dc91e79f2873201b21e8e218c31dad2e16ce0db3c2cb4ce64d2a7b60398d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A96 5292 bytes
font_01_sfnt_off00006c6a.bin
c45c161f54ed5a6a79fcf478b5a86094009979c752b3a86bcc65b1be57c83af3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6A 2504 bytes
font_02_sfnt_off00007751.bin
2419eacf6b8ad08ef66c56fc6cc0df6325ba2086539b2cab404282972481b836		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7751 10060 bytes

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