Malicious PDF — malware analysis report

Static analysis result for SHA-256 8995daeb9a0e9f64…

MALICIOUS

PDF

48.2 KB Created: 2020-08-20 06:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 027eae40f8f382325e5a452acc97737f SHA-1: 5b7504c671f4b514f05d041ce5a76d14862565f3 SHA-256: 8995daeb9a0e9f643fabd1cbc9067ff45ce3c94c817f963d2df594081a964ce9
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.com/pify?keyword=bar+chart+android+library'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=bar+chart+android+library
    • http://files.bethanysanderson.com/uploads/1/3/1/8/131871424/2d16dbae410.pdf
    • http://tamakeno.worldwidepropertyinvestment.com/uploads/1/3/2/7/132712323/ac5b250370.pdf
    • https://cdn.shopify.com/s/files/1/0437/1909/8523/files/new_archie_comics.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/89732718731.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/luigi_s_mansion_rom.pdf
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/58664806951.pdf
    • https://cdn.shopify.com/s/files/1/0435/3196/0474/files/71839120859.pdf
    • https://cdn.shopify.com/s/files/1/0434/4489/5909/files/charles_proxy_3._3._1_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/saleroponafofubeselitunet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071c1.bin
1bd6155a7b3855a03af291e2f18f03995df6695521640f293c400df51f656263		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C1 4808 bytes
font_01_sfnt_off00008200.bin
43ec86fa3c0e9adf8e895219a7ff5f06a884d165c2e8a77cf46842248dd853fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8200 10684 bytes
font_02_sfnt_off0000a696.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA696 4324 bytes

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