Malicious PDF — malware analysis report

Static analysis result for SHA-256 8118574044e648c4…

MALICIOUS

PDF

43.0 KB Created: 2020-09-01 12:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5d1569dad2a1e784aa550d98ba873c9 SHA-1: fd249db64d3e612c84b479d65c8c737acd0af6f8 SHA-256: 8118574044e648c4d1f16a38d4d30942e28626e585f406f3e1adaf8d4e3297cf
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a link farm. The primary malicious URL, https://ttraff.me/wix?keyword=irritating+ringtones+free, is likely used to lure victims. The document body, though heavily obfuscated, contains references to this URL and other benign-looking PDF links, suggesting a coordinated effort to distribute malicious content through a link farm. 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.me/wix?keyword=irritating+ringtones+free
    • https://static.usrfiles.com/ugd/b8c837_4f430eee9e9b442993b1fc04c3d562ac.pdf
    • https://static.usrfiles.com/ugd/e5412a_49ede0e2aa9f47668d6703d2e87968e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_766294f9829343e69533363d1e0b2827.pdf
    • https://cdn.shopify.com/s/files/1/0438/6324/4960/files/architecting_microsoft_azure_solutions_study_lab_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/denizozufofinire.pdf
    • https://cdn.shopify.com/s/files/1/0437/5783/0298/files/adsl_informatica_que_es.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/paleo_diet_food_list_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0443/3159/7980/files/jurnal_anabolisme.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c52407394504aaeba3a17284267aed0.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f0f9a54652d4f639fba48411a3286b6.pdf
    • https://static.usrfiles.com/ugd/bfbc46_d4b31047a5ef4071a5534f0d46d6a103.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e3d2afce0414796b97d8b1b9369c023.pdf
    • https://static.usrfiles.com/ugd/0bcf16_f88f6538907848e4b98bd142ba331092.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_off00005e5e.bin
7190e186aea73d3b29d77e388dfa109b9bfeeffddb93c0f200e965d057b000d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5E 4628 bytes
font_01_sfnt_off00006e17.bin
a579c071ac8f24614b1a0ef5f487a757fe8428b06fae79bb9672cab02f0f6515		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E17 10240 bytes
font_02_sfnt_off00009117.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9117 4324 bytes

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