Malicious PDF — malware analysis report

Static analysis result for SHA-256 da69d874c4387ebd…

MALICIOUS

PDF

56.7 KB Created: 2020-08-12 14:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ba49a8ec266ff980256977e01ee9837 SHA-1: fe3f83bc0468fc08067a739b413c5e4c11582e79 SHA-256: da69d874c4387ebdd5cc6be2e4d608652bb10523297ef5c37b7fab291136cbbd
152 Risk Score

Malware Insights

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

The PDF contains a link farm with 18 external PDF links, many of which point to suspicious domains. The primary malicious link, 'https://ttraff.cc/pify?keyword=buscopan+composto+ampola+pdf', is identified as a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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.cc/pify?keyword=buscopan+composto+ampola+pdf
    • http://files.ndrives.com/uploads/1/3/1/4/131413678/ca7b47.pdf
    • http://files.goldenpandarestaurant.com/uploads/1/3/1/4/131454620/860583.pdf
    • http://vofixolej.harristonunited.com/uploads/1/3/2/8/132815176/fijekuba.pdf
    • http://files.maelasesethics.com/uploads/1/3/0/7/130738845/lasevojalobifokozelu.pdf
    • http://files.southwestvintagecycle.com/uploads/1/3/1/4/131453850/sisunal_matefute_wopudogipiwex.pdf
    • http://vofixolej.harristonunited.com/uploads/
    • https://cdn.shopify.com/s/files/1/0432/5372/7394/files/5337675340.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/6041871159.pdf
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/preposition_of_place_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/fexuwuxogofosefi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/88455986077.pdf
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/passport_renewal_application_form_australia.pdf
    • https://cdn.shopify.com/s/files/1/0439/5276/7131/files/bafakulu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/lulolijajatadifewakom.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/assassin_s_creed_brotherhood_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/jilubulawejixami.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5805/files/what_is_com._tmobile._pr._adapt.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/kirajibonisox.pdf
    • https://cdn.shopify.com/s/files/1/0438/1533/8144/files/99112702653.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_off00009fb2.bin
d70ebfc91cedea097901b17adf772a19439149bc91b04c675a225e83ba8d68c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB2 5256 bytes
font_01_sfnt_off0000b17b.bin
18273230cde20a1f802a65f427e3efb211bd4a56605944e6edcbc92f76a259c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB17B 10776 bytes

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