Malicious PDF — malware analysis report

Static analysis result for SHA-256 008cd4293a9114d8…

MALICIOUS

PDF

42.2 KB Created: 2020-08-30 19:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b8327d84424a37321eaeb1ec695a105 SHA-1: eeaddc899b72d0624e529927268f0e5966195d60 SHA-256: 008cd4293a9114d87a08947530366848e6e23bf95b23ceddbfc41b7f2b52bc5a
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external links, suggesting a link farm or SEO poisoning attempt. The presence of a 'download button' lure further supports a phishing or malicious redirection scheme. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=carnevil+arcade+game+for+sale
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8558/6841/files/18874965375.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3488/files/pdf_to_ms_word_editor_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/96635152833.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/tudikibodedewojigok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rimudunibodosugesujusuvud.pdf
    • https://cdn.shopify.com/s/files/1/0431/3923/5997/files/baa_baa_black_sheep_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/pagejaseriju.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/65765731140.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/jirixagabeposazunulu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1610/0776/files/life_keith_richards.pdf
    • https://static.usrfiles.com/ugd/353d00_00d61ae69736421cb2c16ece921e1ca7.pdf
    • https://static.usrfiles.com/ugd/95089d_26cfc87152d64b549b9f34f06626c836.pdf
    • https://static.usrfiles.com/ugd/b8c837_50c5f36120034c78a994adac33fb97bf.pdf
    • https://cdn.shopify.com/s/files/1/0429/4384/0412/files/20327329847.pdf
    • https://cdn.shopify.com/s/files/1/0436/0686/8131/files/lowes_waynesville_nc.pdf
    • https://cdn.shopify.com/s/files/1/0445/6900/2143/files/84193530981.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_off000059af.bin
b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59AF 2828 bytes
font_01_sfnt_off000063aa.bin
1c2fc530bca9209aa01f5f8d850ad53c0372c70f2c3b54c7f83ce30eb2a4bfe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63AA 5304 bytes
font_02_sfnt_off000075a3.bin
ef84ae8595ac55025a0f35f16522183ebc651328a220e6d23940623a03d17814		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A3 10672 bytes

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