Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d8a55b813e01db5…

MALICIOUS

PDF

39.5 KB Created: 2020-08-16 19:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf132d430490dbf5dc2aba263a8eb6ac SHA-1: 44bdd26ceed3ee730149a7c1d52a6154a74e0a23 SHA-256: 8d8a55b813e01db5b5569db3a49702fc5b266361c92248098135bca64537c769
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The primary malicious URL is 'https://ttraff.com/pify?keyword=lagu+barasuara+terpopuler', which is likely the initial stage of a phishing or malware delivery chain. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence of malicious intent.

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=lagu+barasuara+terpopuler
    • http://bedis.cttntraumatraining.org/uploads/1/3/1/3/131381204/tojabelonejogu-luwiwinedu-tujowavozam.pdf
    • https://cdn.shopify.com/s/files/1/0437/1290/5384/files/57282706735.pdf
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/ravebolisufo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8301/9941/files/90181454796.pdf
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/boziku.pdf
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/lajositogo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1326/files/rekipejo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3862/2375/files/xizas.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/adele_skyfall_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/4729434684.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/79581919136.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6324/files/toxepumupefezojagaju.pdf
    • https://cdn.shopify.com/s/files/1/0437/8837/0072/files/stihl_weed_eater_repair.pdf
    • https://cdn.shopify.com/s/files/1/0431/8055/6452/files/59712729680.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_off00005d9b.bin
b98a68b21a1fb8891b18f0e05245e86f8de77642584ba3e2d9bcf74790a4a18a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9B 5068 bytes
font_01_sfnt_off00006ee6.bin
61a5db699d8170856a3aff514927a8b931afdac5188dced45200aebcdf565b37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE6 10060 bytes

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