Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d5eab95786cb89…

MALICIOUS

PDF

48.6 KB Created: 2020-08-12 16:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfa3fe5996c6a3626ca55eab7a5b6390 SHA-1: cd16973f52862f8e0533257244bb6b78c55ea38f SHA-256: 74d5eab95786cb89af72e87fac4320932badc6d00059d48804992b063ce50978
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating an attempt to drive traffic to malicious sites. The embedded URL 'https://ttraff.cc/pify?keyword=acoustic+guitar+songs+for+beginners+pdf' is a known malicious redirector, suggesting the document's purpose is to lead users to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=acoustic+guitar+songs+for+beginners+pdf
    • http://dezola.binghamswimschool.com/uploads/1/3/1/8/131871921/jepuwolivewi.pdf
    • http://files.vertex-tooling.com/uploads/1/3/0/8/130873794/7d56c.pdf
    • http://rogub.totallytaggart.com/uploads/1/3/1/3/131380999/kisuto_dikirekukiwu_sofodamebuduv_gugatobasupa.pdf
    • http://vexagifex.thewhitewillowstudio.com/uploads/1/3/1/4/131453109/fujipuz_nekovuzipex_nuzib_misok.pdf
    • http://files.colangelowine.com/uploads/1/3/0/9/130969663/ef772e0a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/juwunul.pdf
    • https://cdn.shopify.com/s/files/1/0438/4522/2557/files/l_argot_franais.pdf
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/76915210082.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6307/files/satizor.pdf
    • https://cdn.shopify.com/s/files/1/0433/7926/1590/files/41432333539.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/14049041434.pdf
    • https://cdn.shopify.com/s/files/1/0438/6842/2309/files/52869289597.pdf
    • https://cdn.shopify.com/s/files/1/0433/6756/3420/files/husqvarna_51_chainsaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/9342/5316/files/consumer_attitude_models.pdf
    • https://cdn.shopify.com/s/files/1/0429/5639/0559/files/bloomberg_markets_live_forever_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/ps2_classic_on_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0432/9914/3838/files/95053968016.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_off00007f45.bin
1a1a150ebb9e21f3be7801b4b297dc406c56ade297a632f113e61237fe2c5016		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F45 5420 bytes
font_01_sfnt_off000091b6.bin
ac8502ec3c537e51964df8d2d4cc07b39108a667651bd16608da9250cbe70ca5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91B6 10368 bytes

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