Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6f3c7997bb546a…

MALICIOUS

PDF

43.5 KB Created: 2020-08-16 11:01:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d772808437c0d94fd26253daca7b1736 SHA-1: 4254a43337029827b08e69771eb789f86b7fb099 SHA-256: 6c6f3c7997bb546a668e685de298edd0017313a7a072fbda5ca2e4c41a9e51d0
162 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body and heuristics indicate a lure for downloading software, likely a pretext for malware delivery. The presence of a download button lure and links to external content farms further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=winzip+free+online
    • http://files.mylenebaxterconsulting.com/uploads/1/3/2/6/132695806/kozuxebosalawif_weriripida_dumowuf.pdf
    • http://files.greshamcarpetcleaning.com/uploads/1/3/0/7/130775350/mukasu.pdf
    • http://files.hugheslandscaping.com/uploads/1/3/0/8/130813612/seketelab_xumanagas_gakazotija_zoziz.pdf
    • http://files.mightyandmessylife.com/uploads/1/3/0/7/130739776/bitidenupawapokonezi.pdf
    • http://files.middlefieldny.org/uploads/1/3/2/3/132303382/wiselab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/8658/3710/files/52177253668.pdf
    • https://cdn.shopify.com/s/files/1/0452/3737/1037/files/allegra_120_bula.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/24972255416.pdf
    • https://cdn.shopify.com/s/files/1/0433/0677/8777/files/5447763040.pdf
    • https://cdn.shopify.com/s/files/1/0435/3359/8880/files/materiales_metalicos_ferrosos.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/5663086819.pdf
    • https://cdn.shopify.com/s/files/1/0432/7420/7387/files/moxosewepupujebeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/rodiguxipe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2652/9956/files/33617193457.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f8d.bin
1ab764f8275d5362ba4fe649851f55c9df65902c18faabd4c94ff1c6a22f27fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8D 4280 bytes
font_01_sfnt_off00006e1c.bin
8fa088cd012c376284316df78e22e9a9a85df9b47b7f871fca3c467226ca715e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1C 11368 bytes
font_02_sfnt_off00009373.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9373 4324 bytes

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