Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37f7b40d23c00be…

MALICIOUS

PDF

40.0 KB Created: 2020-08-23 03:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 035269c7a83c2b1f6c4fe37454dc34c0 SHA-1: 04d2ca9e15e44fef582c245296499c7fb6930d99 SHA-256: b37f7b40d23c00be298206dc14d109dbd0d4ac8a6987d1189dec22a872401c5f
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.cc/pify?keyword=angaar+bengali+movie', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the heuristic firings strongly indicate malicious redirection.

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/pify?keyword=angaar+bengali+movie
    • http://koromusud.hipsterleaks.com/uploads/1/3/0/9/130969627/nubadozogawifidenig.pdf
    • http://saxewat.ocacolorrun.com/uploads/1/3/2/8/132814439/wivajopumu-dabikafelimore-bukufuzikami-goloxeno.pdf
    • http://dodefov.eco-tique.com/uploads/1/3/1/6/131606183/402e88169.pdf
    • http://files.finesoftday.com/uploads/1/3/2/6/132696210/nexudebaj.pdf
    • http://files.knowlton.ca/uploads/1/3/0/7/130740342/e329cf3dabd64.pdf
    • https://cdn.shopify.com/s/files/1/0437/2099/9064/files/49342841906.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/79247902422.pdf
    • https://cdn.shopify.com/s/files/1/0435/8891/1267/files/minority_community_and_stigmatization.pdf
    • https://cdn.shopify.com/s/files/1/0433/2912/6550/files/sevopimuwe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6474/4343/files/semipulutuvune.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/adobe_photoshop_7._0_exe.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/captopril_renogram_snm_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/8356/3162/files/82396565616.pdf
    • https://cdn.shopify.com/s/files/1/0448/3104/7842/files/sibanixomanijalok.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4585/files/26359051755.pdf
    • https://cdn.shopify.com/s/files/1/0428/5952/8355/files/onan_7500_quiet_diesel_generator_manual.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_off00004f5b.bin
77f710ba4500383ae581dc490839f9a0e406b47ec8b2c1d08ba6d886ba739c5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5B 5016 bytes
font_01_sfnt_off0000605a.bin
c3f386479e0fcde8993844c5a5e99c6e2839022d1f20b722e8186971e18be8aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x605A 5088 bytes
font_02_sfnt_off000070f7.bin
587e835041269e7bfdddd209f0c58c1ff012e07b06b515d0eb6c4bb4baa736bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x70F7 9988 bytes