Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b8874eda01f3c03…

MALICIOUS

PDF

33.3 KB Created: 2020-08-10 01:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85e4344fe4f955b50a5034e38218dffc SHA-1: c8a7d6addd42827332a4ba32ce0f5ee117074d07 SHA-256: 1b8874eda01f3c03787c346ebd53372c7a3fdb02aef0c4c0c42ec4e2a8e7a10d
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The document body, though heavily corrupted, contains the URL 'https://ttraff.cc/pify?keyword=letter+tracing+sheets+pdf', which is also present in the heuristics. This indicates the document is designed to trick users into visiting a malicious site under the guise of providing tracing sheets.

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.cc/pify?keyword=letter+tracing+sheets+pdf
    • http://files.k10research.com/uploads/1/3/0/7/130775493/kalutulazaw.pdf
    • http://files.bethanyscottsdale.com/uploads/1/3/0/7/130738657/tovaduretiloler-susaminuk-vimojolesuji-zefifege.pdf
    • http://files.garykearneyart.com/uploads/1/3/1/4/131406505/luzejafokedexomeki.pdf
    • https://cdn.shopify.com/s/files/1/0438/6127/8870/files/veliwoxelesadeberox.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/patarakewijuxasokug.pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/pikutusit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34597476450.pdf
    • https://cdn.shopify.com/s/files/1/0433/0710/6462/files/shakespeare_sonnet_55.pdf
    • https://cdn.shopify.com/s/files/1/0433/0340/3678/files/pokemon_sprites_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9301/7247/files/iseki_tractor_parts.pdf
    • https://cdn.shopify.com/s/files/1/0441/0490/8952/files/64064736460.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0503/files/business_development_manager_duties.pdf
    • https://cdn.shopify.com/s/files/1/0433/4495/3509/files/36074258042.pdf
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/firdous_physiology_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/5083/5876/files/88899128530.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_off0000449a.bin
ec7467eda0986f022090136b3351876f1d94957d33ebe4a4b99588af4c8e4811		 pdf-font-stream PDF embedded font (sfnt) at offset 0x449A 5324 bytes
font_01_sfnt_off000056b3.bin
e0695bdeb775d0a454e8a83483f56f955dd99313c8318008fd96c7aff3d328e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56B3 9956 bytes

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