Malicious PDF — malware analysis report

Static analysis result for SHA-256 5df9ae1eefb0a408…

MALICIOUS

PDF

47.1 KB Created: 2020-09-10 06:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3230c23b0fbd7d7d367a608c2b1ef4d2 SHA-1: 04f7983bda88bdde96201946b22630c98b1f8b81 SHA-256: 5df9ae1eefb0a40834a350938680c6bea8620fbbb42f3ae627a104d848a1caa7
162 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'Cisco spark flex plan datasheet'. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to disguise the malicious intent. 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.me/wix?keyword=cisco+spark+flex+plan+datasheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/heckmondwike_primary_school_ofsted_report.pdf
    • https://cdn.shopify.com/s/files/1/0451/0469/3400/files/thompson_history_of_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4060/2269/files/formal_letter_template_canada.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/zifodoperifuvebut.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/antigone_lietuviskai.pdf
    • https://static.usrfiles.com/ugd/b3bc21_33ebffab06e9409eae5af9d424e59897.pdf
    • https://static.usrfiles.com/ugd/b8c837_1906bb1a8ecc41209f4824dbbc3168b9.pdf
    • https://static.usrfiles.com/ugd/2f8cea_cd0d56e0b559453ab74a3084da8ac92e.pdf
    • https://static.usrfiles.com/ugd/5a1791_06d05e2bac154168bc82565fbe837860.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2678/files/free_download_islamic_books_urdu_language.pdf
    • https://cdn.shopify.com/s/files/1/0463/2736/5789/files/suxolugajoludakepukef.pdf
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/a_grief_observed_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/7234/7550/files/vukivizev.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_off000078f5.bin
54e39c7590f3258be1c135449438469f679cc06b76ef70299dae29dba2d5701e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F5 5280 bytes
font_01_sfnt_off00008ae9.bin
a9bf525b9f74fbce4cc43834446e67aa0b9abee1c0e080364fd5e58ed301db79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE9 10772 bytes

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