Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1027ab5d4f9c9a1…

MALICIOUS

PDF

50.6 KB Created: 2020-08-11 15:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d07605d6c0ff74af392cfdbe492af235 SHA-1: 46055746d469831361b1deb0d6388e34d63997c7 SHA-256: f1027ab5d4f9c9a137b2716564b724912d627e0d64dd9f14b0731d93510227ef
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body and structure indicate it's designed to lure users into clicking these links, likely leading to further malicious content or exploits. The ML classifier also strongly indicated maliciousness.

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=autoclave+composite+manufacturing+pdf
    • http://files.diazcounseling.com/uploads/1/3/1/3/131382808/ddebe6f68.pdf
    • http://files.becican.com/uploads/1/3/1/0/131070212/tadoliluvibu_tovefomiral_tikeladodi.pdf
    • http://foguludus.stpaulsgpk.org/uploads/1/3/1/0/131070450/viluvut.pdf
    • http://fakewofad.kksquiltstudio.com/uploads/1/3/1/4/131437657/liregek_vabanagu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4047/9144/files/25310737600.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/miwaranav.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/roxev.pdf
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/tufirisinirov.pdf
    • https://cdn.shopify.com/s/files/1/0449/2463/3243/files/t2_ankle_arthrodesis_nail.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/tadejokoxuxapokiraj.pdf
    • https://cdn.shopify.com/s/files/1/0428/2993/8855/files/pajimagafegedimujefewe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/86229275512.pdf
    • https://cdn.shopify.com/s/files/1/0432/9367/1588/files/75834010688.pdf
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/zowatolixuxagotuje.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/capitalist_development_and_democracy.pdf
    • https://cdn.shopify.com/s/files/1/0433/1782/1605/files/lifunijoba.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1196/files/vodidadu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/algorithm_design_and_applications_solutions_manual.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_off000078bb.bin
41df4d43bc2b500744b60f1876d208dd0c9ea000a0db6350aca503bf467a0cf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78BB 5408 bytes
font_01_sfnt_off00008b0c.bin
5fdc8d6ae87eaca6d673ff7f44654ac5ad9c1b2a72e7e100439c6606be3001b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0C 10556 bytes
font_02_sfnt_off0000af10.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF10 4324 bytes

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