Malicious PDF — malware analysis report

Static analysis result for SHA-256 10fce35f2d60e618…

MALICIOUS

PDF

44.2 KB Created: 2020-08-16 17:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe1d557c3dd8177b1660a197665791de SHA-1: 8474b2ffe37f98ecefc39ae084052e7e24e42e89 SHA-256: 10fce35f2d60e6182a1735fcd9c753214e05b460ccf234bbeece053b979b597a
162 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for phishing and malware distribution. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links suggests a link farm designed to obscure the true destination. The document body, though partially corrupted, contains the malicious URL and appears to be a lure for a 'jazz guitar chord sheet'. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=jazz+guitar+chord+sheet
    • http://pugemarun.diamondmarvelsengraving.com/uploads/1/3/1/4/131453850/zozazopa.pdf
    • http://files.owencountyfair.com/uploads/1/3/2/3/132303175/ee90efa42.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29121996303.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52209678420.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/73788425338.pdf
    • https://cdn.shopify.com/s/files/1/0428/7122/6534/files/88839275586.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/jang_newspaper_22_september_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3567/files/rusazuwozaposanafuma.pdf
    • https://cdn.shopify.com/s/files/1/0439/0689/1931/files/cryogenic_engine_seminar_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/3246/8904/files/13961041716.pdf
    • https://cdn.shopify.com/s/files/1/0432/3042/9346/files/56137563109.pdf
    • https://cdn.shopify.com/s/files/1/0436/4324/0606/files/pavuxudisitijaxoxevej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60868594071.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_off00006872.bin
968f38873c4ba4e09d06e587d53211a53d4504b6976fb0dda458120622798d4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6872 5208 bytes
font_01_sfnt_off00007a1c.bin
57b4d8b95cea018de32e98c733278f668f6d77a4650fb392e1e589189c23e275		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1C 13300 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.