Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0a1fa8e85e1306…

MALICIOUS

PDF

59.8 KB Created: 2020-08-21 14:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38f2bbe9ebffabdc303ed4690fc3cd1d SHA-1: 160338722a6d27e5efb4dc05b71c9620d1d2096b SHA-256: 9a0a1fa8e85e1306d44d81b079a2d02b38d3e0a5f7b6b8c78f8fda35f7ee3e81
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a link farm or redirection attempt. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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=formato+demanda+amparo+indirecto+laboral
    • http://dosegela.peacefulseaproductions.com/uploads/1/3/0/8/130814328/romadamirim-nunotevosezo-tolesoler-ropapilil.pdf
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/41249680720.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3414/files/62084475538.pdf
    • https://cdn.shopify.com/s/files/1/0439/8841/8718/files/bovaziro.pdf
    • https://cdn.shopify.com/s/files/1/0431/7118/4794/files/nowumixozusonizalelixuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/0595/8553/files/tipebax.pdf
    • https://cdn.shopify.com/s/files/1/0434/9784/8996/files/72845860092.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5669/files/gazigisevurezopopev.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/cadena_de_suministro_ronald_ballou.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/lekejefefawusaluz.pdf
    • https://cdn.shopify.com/s/files/1/0438/4981/0080/files/55126840743.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/32983582660.pdf
    • https://cdn.shopify.com/s/files/1/0429/2440/8988/files/ririrejisumevusederapupo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008733.bin
4a8436b28804e5ac14f5d04d71e961e89fe77629e864e56665e8d325e2bd3d0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8733 4924 bytes
font_01_sfnt_off000097c6.bin
e899927fc63aa7a6fea61972571c44b3494839138ad221d5a51783bdd2ffc5fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97C6 12804 bytes
font_02_sfnt_off0000bf2b.bin
52e82f317fd07460633fde2b4a13b2271e088719cba8b5abc0141cb327413dbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2B 16076 bytes
font_03_sfnt_off0000d3c7.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C7 4324 bytes

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