Malicious PDF — malware analysis report

Static analysis result for SHA-256 086693768eb7e5fe…

MALICIOUS

PDF

36.8 KB Created: 2020-08-27 15:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66ad41dbc9eb42c16a026ce0fcf1c1ad SHA-1: d2fe89a5c781b73585fbbf9e14b0bf426e6c8fff SHA-256: 086693768eb7e5fe2cb7b8f62fdf2f7f7704f114bce4a065f7475ee87c255281
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to distribute malicious content or phish users.

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/pify?keyword=linea+de+damoiseau
    • http://xewafo.jessestewart.net/uploads/1/3/1/3/131398222/pegaturevovirodoweka.pdf
    • http://files.lemeloneshop.com/uploads/1/3/2/6/132695663/papamubemoxofufi.pdf
    • http://powowu.smilingshelves.com/uploads/1/3/1/4/131438610/doduvabiwonabag-porepegif-kuganefenuzev.pdf
    • http://files.theoldbarnlulworthcove.com/uploads/1/3/1/3/131381288/2886964.pdf
    • http://files.maplesweet.ca/uploads/1/3/0/8/130874422/xujififesoza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/52060343198.pdf
    • https://cdn.shopify.com/s/files/1/0432/9157/4430/files/39815888299.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/60456001200.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/xokujekasokuto.pdf
    • https://cdn.shopify.com/s/files/1/0447/2566/5945/files/jewaxonubajedusunamiki.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/the_human_brain_coloring_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/4181/4693/files/rufagamiluruminan.pdf
    • https://cdn.shopify.com/s/files/1/0438/4076/6109/files/cold-_formed_steel_built-_up_section_properties.pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/lefixiravawimozuninijiveg.pdf
    • https://cdn.shopify.com/s/files/1/0435/6230/3637/files/70828815397.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/biogeochemical_cycle_of_carbon.pdf
    • https://cdn.shopify.com/s/files/1/0463/5987/1643/files/vetefozenaxemoga.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000542c.bin
d15ebe7e67ec73708992a813aed12c90dbf54f6e6128553f3ddd758854cc7345		 pdf-font-stream PDF embedded font (sfnt) at offset 0x542C 4784 bytes
font_01_sfnt_off00006459.bin
f8184d4182039430cb219ae33d80b388ccacfb75abe5038406da688093f680e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6459 10024 bytes

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