Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a18ecc13acb056…

MALICIOUS

PDF

42.6 KB Created: 2020-08-08 23:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea0e8d0a2d1d8a7d24bdb59de116dd8c SHA-1: 03b0d99ca52bfe47c2ed0c61caed2f50493a5e83 SHA-256: 95a18ecc13acb056c0e69ec9d5cf1627a78afea24684c7e6eb8c5c3d6d10baf7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.com/pify?keyword=automatic+sprinkler+systems+handbook+2020+pdf'. The document body, though heavily obfuscated, contains text suggesting it is disguised as a handbook. The ML classifier strongly indicates maliciousness. The presence of a link farm and a redirector suggests the primary goal is to lead the user to a malicious site, likely for phishing or further malware delivery.

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=automatic+sprinkler+systems+handbook+2020+pdf
    • http://files.enidokrentals.com/uploads/1/3/2/6/132682970/bosoganamuge-kerositumo-jomibaga-sodeduzudonali.pdf
    • http://files.brokerluxuryyacht.com/uploads/1/3/1/3/131379591/pirezin-lalanep.pdf
    • http://farifozen.acupunctureblueturtle.com/uploads/1/3/0/7/130775350/futofujunu.pdf
    • http://files.marinchorus.org/uploads/1/3/0/9/130969403/wosumizimijusu_wojokekesajibub_taparazoniw.pdf
    • http://buwex.dakotayouthandyoungadults.org/uploads/1/3/0/7/130776031/433111.pdf
    • https://cdn.shopify.com/s/files/1/0440/5123/4981/files/lucky_egg_platinum.pdf
    • https://cdn.shopify.com/s/files/1/0437/1002/1787/files/malaxexirepurakuki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.pdf
    • https://cdn.shopify.com/s/files/1/0428/2915/2423/files/garukorenekez.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3362/files/71983491134.pdf
    • https://cdn.shopify.com/s/files/1/0439/4660/6760/files/fegup.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0813/files/combiner_deux_fichier.pdf
    • https://cdn.shopify.com/s/files/1/0439/1341/2760/files/wasiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4948/3426/files/jodunixomorobufejekuban.pdf
    • https://cdn.shopify.com/s/files/1/0437/1175/8491/files/71251802754.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/8942390077.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066fb.bin
d1590f0f51f25320a8f71767a47fc2ed25d6788e81ef4d3cd5d21f3668230192		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66FB 5964 bytes
font_01_sfnt_off00007b25.bin
5ece535dd062d60a2adfd348d0d54fc06ac85b66218f2c6659185550542427b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B25 10024 bytes

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