Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d54b73446efe31f…

MALICIOUS

PDF

44.5 KB Created: 2020-08-05 15:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8fc72c53e9377bee94db43a1a07665e SHA-1: 9a9f939eabe2e7362f285c191d5828ec7a739826 SHA-256: 0d54b73446efe31f69a3de499f5d75d29a18089c8ee0b74e1dec1024012011b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO spam tactic designed to funnel users to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the presence of malicious redirector links.

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.com/pify?keyword=marvel+universe+vs+the+punisher+pdf
    • http://files.adara.org/uploads/1/3/1/6/131607269/cb8989e9946447.pdf
    • http://files.hudsonfarmersmarketny.com/uploads/1/3/0/8/130874254/kogifu.pdf
    • http://files.olivesnstuff.co.uk/uploads/1/3/0/7/130776247/f152d6d32456947.pdf
    • http://files.qthpublishing.com/uploads/1/3/1/3/131381946/4d7c5.pdf
    • http://files.fireflyflowerfarm.com/uploads/1/3/2/6/132682897/1081627.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2384/2983/files/18429855978.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5041/files/apluda_mutica.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/xidulufigisajigizedotamu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25322908130.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0293/files/64270590864.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42539854631.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5324/files/form_ct_6.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4369/files/how_to_program_a_ge_universal_remote.pdf
    • https://cdn.shopify.com/s/files/1/0430/4653/5322/files/nufozaviji.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/86818134252.pdf
    • https://cdn.shopify.com/s/files/1/0435/4539/5359/files/19724499294.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_off00006fef.bin
59b0fbea43bca1af99ebe586e893361d653fd9598aaa879ed043a6a9847d7f01
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEF 5192 bytes
font_01_sfnt_off000081a7.bin
798b9665c068fb07434d428cf4c048d389ccebd40438bff8cfb71f56ee9c2094
pdf-font-stream PDF embedded font (sfnt) at offset 0x81A7 10224 bytes