Malicious PDF — malware analysis report

Static analysis result for SHA-256 9741dcff94cb4549…

MALICIOUS

PDF

45.6 KB Created: 2020-08-13 05:27:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b49403ca7cd0b4e4af71b81784ec5290 SHA-1: d3ad8f9a3d1bad4c47fc7f83440255a4b9a392e2 SHA-256: 9741dcff94cb4549188d20e4035a90e6f7865bfdaeb281608a64351f6a7a050f
150 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a service manual download. It also features a link farm with numerous external PDF links, likely to obscure the malicious destination and improve SEO. The ML classifier strongly indicated maliciousness, and the primary URL points to known malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wb?keyword=subaru%20forester%202010%20service%20manual%20download
    • http://zezeforo.thepowerofpainting.com/uploads/1/3/0/8/130814238/xotiwajukex.pdf
    • http://files.jillianbretzdoula.com/uploads/1/3/2/3/132303270/kibofewuluzogemov.pdf
    • http://files.cityofnewhall.com/uploads/1/3/2/3/132302951/a87ee9c658.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/adverbios_de_frecuencia_presente_simple.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/30293876855.pdf
    • https://cdn.shopify.com/s/files/1/0440/1420/7134/files/lunamakizimexozebe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/1977796539.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/tetamujibijolekiju.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/5843033671.pdf
    • https://cdn.shopify.com/s/files/1/0434/0406/6983/files/wamuzovemeze.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdf
    • https://cdn.shopify.com/s/files/1/0433/4298/7422/files/22272256216.pdf
    • https://cdn.shopify.com/s/files/1/0427/9874/3719/files/fuvus.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/english_to_arabic_language_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/liwupijolupeg.pdf
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/57225734966.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_off0000717e.bin
962eecfdbea3baf3183b2c23812b87cc85f110bc5cbd9c8ca760bf4188ce1f44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x717E 5888 bytes
font_01_sfnt_off00008589.bin
9e00c01a7a8b36b8963bacd8fbaddd764e861669cfc9fdaf9eb2f91e041a09c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8589 10376 bytes

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