Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2f6b0fd2d34ce6…

MALICIOUS

PDF

42.9 KB Created: 2020-08-06 19:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 478c464aaa028838d5cdf423b54c4eda SHA-1: 44b8db3f9946508a4af184a5d74ac0bd5e60f6e1 SHA-256: 0d2f6b0fd2d34ce6f197a02245eab6c7aced83d795278a4d2b910300f4c855a0
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search results for 'wood carving books for beginners pdf', but the primary link redirects to malicious infrastructure. This suggests a phishing or scam attempt, likely using the document as a lure to drive traffic to a malicious site. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=wood+carving+books+for+beginners+pdf
    • http://files.leesteadmanwelding.fr/uploads/1/3/0/8/130874010/4997589.pdf
    • http://kokaf.drrobertwwalker.com/uploads/1/3/0/8/130874633/nijerod_nufarepotus.pdf
    • http://files.smarttc.co.uk/uploads/1/3/0/7/130739210/dutogemevuj.pdf
    • http://files.pmd-geoffbarker.com.au/uploads/1/3/1/4/131408256/2337566.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/xekagilokorimitamuxoluve.pdf
    • https://cdn.shopify.com/s/files/1/0430/2284/4067/files/kuwapoxamuxizafadexi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5842/files/75462816760.pdf
    • https://cdn.shopify.com/s/files/1/0436/5520/0918/files/tutewitinoxer.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/vuromil.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3939/files/pitataxaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7346/files/67642030072.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/43894324062.pdf
    • https://cdn.shopify.com/s/files/1/0431/8252/2528/files/8709531851.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/wamemolodako.pdf
    • https://cdn.shopify.com/s/files/1/0438/2025/3344/files/26316904336.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bizisumexu.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_off000066f1.bin
3d4c868bb487ff05f493cb61d56d5f9d70d3dbe512fdc89dd76961c8d9c10e4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x66F1 5568 bytes
font_01_sfnt_off00007a04.bin
61916f67d748c04f916074ad103f447ef9b72b050329731f9e94000a80e4ece4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A04 10584 bytes