Malicious PDF — malware analysis report

Static analysis result for SHA-256 01166aebdd33f8f7…

MALICIOUS

PDF

44.0 KB Created: 2020-08-15 04:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20c8c673a1d87efb8a139d3fb03370da SHA-1: b55c423c35e9d258584521c56e8f438afdc97499 SHA-256: 01166aebdd33f8f703c2f7331fc8f0313698d87039d5af4144cc716a5f6ed985
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=oven+sheet+pan+size'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs, reinforcing the link-based attack vector.

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=oven+sheet+pan+size
    • http://files.qualitycraftedstoragesheds.com/uploads/1/3/1/4/131437295/6450363.pdf
    • http://files.takingrefuge.net/uploads/1/3/1/4/131483685/7736888.pdf
    • http://vosajon.spgaelite.com/uploads/1/3/1/4/131406436/e18b9c.pdf
    • http://nelesesit.carriagehouseclothing.com/uploads/1/3/1/8/131856190/6247749.pdf
    • http://files.victoriachampionart.com/uploads/1/3/1/6/131606325/lefapibax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/senow.pdf
    • https://cdn.shopify.com/s/files/1/0453/6195/4971/files/75110641987.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/43126620293.pdf
    • https://cdn.shopify.com/s/files/1/0430/3834/3322/files/vorusoxagewa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6480/2982/files/zujanubanepo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7952/files/webekekafalurawave.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/nusofadadetinironorumive.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/portable_editor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5516/1252/files/character_strengths_inventory.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/minecraft_sky_city.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/antigone_download_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/ssat_lower_level_practice_test.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_off00006371.bin
9a96fe8b5d57b46365963facbccbfe4a3fa2a45dae1adf0d19825f3f39d2c710		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6371 4916 bytes
font_01_sfnt_off00007438.bin
cdc084691e202b9049fe66412af53dbfcfeda8faf2fcfd756130153c0df4c695		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7438 14756 bytes

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