Malicious PDF — malware analysis report

Static analysis result for SHA-256 1936a4dc9a2aa4cb…

MALICIOUS

PDF

37.6 KB Created: 2020-08-23 11:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6660f0eb0d998e936fa17ff276a2fe0 SHA-1: 6b80cbc7f19f29b0f22c9014075265f8ac997142 SHA-256: 1936a4dc9a2aa4cb8becf232938d4e9f5a1c2503f362b3d0c0bdcbc31d5bd5e0
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link disguised as a 'pennant banner template powerpoint' that redirects to a malicious URL. The document also features a large number of links to external PDFs, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of 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=pennant+banner+template+powerpoint
    • http://bobeguk.thewifebehindthefarmer.com/uploads/1/3/1/4/131408970/721873.pdf
    • http://files.mx.cbisociety.org/uploads/1/3/1/3/131383673/nudogajilanigulu.pdf
    • http://files.millerjohnsonmedia.com/uploads/1/3/2/6/132696063/relusubol.pdf
    • http://zerik.problemsofhumanity.org/uploads/1/3/1/4/131406925/zufaduxubizudujiki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/8573/9670/files/canon_ip2700_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0457/0211/9580/files/silicone_scar_gel_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/ketoto.pdf
    • https://cdn.shopify.com/s/files/1/0432/6273/8592/files/bekipumim.pdf
    • https://cdn.shopify.com/s/files/1/0433/6625/2703/files/mejixono.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/5062926047.pdf
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/kasokiwilumima.pdf
    • https://cdn.shopify.com/s/files/1/0432/1860/0103/files/pajajusudodugi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6229/files/27072640358.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91960476686.pdf
    • https://cdn.shopify.com/s/files/1/0432/0935/9520/files/90195406505.pdf
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/debut_video_capture_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0435/5473/4241/files/menivevu.pdf
    • https://cdn.shopify.com/s/files/1/0449/8069/9295/files/nationwide_pet_insurance_claim_form.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_off000055c7.bin
033cc1c8672bce300f22ffa29c3e9e2facaa612433fa8ca517c2fab1d6e6ed20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55C7 5020 bytes
font_01_sfnt_off000066d0.bin
a01e1afd993ca34ee0566796881dfac510abcce3b84849f53bed43a58477aa8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D0 10140 bytes

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