Malicious PDF — malware analysis report

Static analysis result for SHA-256 6226d50c4d1646b4…

MALICIOUS

PDF

46.1 KB Created: 2020-08-08 04:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d845f2dceae3309dc5456e231759824 SHA-1: 1f798c1a8de3ee40ddc4ea65a4cd7a26a6d29fad SHA-256: 6226d50c4d1646b4784f4a1d0fdbcf79b938efc40f25e39e650780727902e72e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body also contains a call-to-action phrase, suggesting a social engineering lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content.

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=filehippo+pdf+merge
    • http://files.rickysaputrayoga.com/uploads/1/3/1/4/131437074/wojexadelubaz_sijemuvoma.pdf
    • http://files.aarondalbey.com/uploads/1/3/2/6/132696030/tagidarikajowe-mugufoxi-burujakoruvo.pdf
    • http://files.robinstravelblog.com/uploads/1/3/1/4/131454238/4562773.pdf
    • http://files.daveghilarducci.com/uploads/1/3/0/9/130969192/vexidenijujiguto.pdf
    • http://files.rtapps.co.uk/uploads/1/3/0/8/130874317/31af4b41.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/77092711773.pdf
    • https://cdn.shopify.com/s/files/1/0437/4183/9514/files/starrett_drill_and_tap_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/pimejotiwekug.pdf
    • https://cdn.shopify.com/s/files/1/0440/4166/6710/files/vizedimixe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/luigi_s_mansion_rom.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/sopazotevanibel.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/mivimur.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/2731598.pdf
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/lujonagebedojifi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5557/0341/files/xajadap.pdf
    • https://cdn.shopify.com/s/files/1/0431/8288/2980/files/90047150780.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
    • https://cdn.shopify.com/s/files/1/0434/5357/9430/files/40964755822.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_off00006a92.bin
4f0a6509b61ec91248bfade1e3e387592e17b2bb8c6ac678ae58ab6842569c30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A92 4624 bytes
font_01_sfnt_off00007a45.bin
34e25e7827e2308a772eaa4fac991e2f6a1d0dbe442a77acc4bc5c7c265edcc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A45 10192 bytes
font_02_sfnt_off00009d0e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D0E 4324 bytes

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