Malicious PDF — malware analysis report

Static analysis result for SHA-256 4301bf5f0367fab6…

MALICIOUS

PDF

37.1 KB Created: 2020-08-05 01:36:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99deb3d3c041a30da9a7059d0e0f8dd2 SHA-1: 5627126477811cf60473f6caa442c2c2105c6652 SHA-256: 4301bf5f0367fab6dc355109a9a96c3b4c04925a26a2531a5629f0c9432290d2
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm and another flagging a direct link to a known malicious redirector. The primary malicious URL is https://ttraff.com/pify?keyword=diccionario+biblico+ilustrado+holman+spanish+edition+pdf. This indicates the PDF's purpose is to lure users to external sites, likely for further exploitation or phishing. No scripts were extracted from this sample.

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=diccionario+biblico+ilustrado+holman+spanish+edition+pdf
    • http://files.shoprlsg.com/uploads/1/3/1/4/131483009/duzilulogegen.pdf
    • http://files.victoriasdesign.studio/uploads/1/3/0/9/130969633/mibajara-povif-piwazizar-dixugig.pdf
    • http://files.hulahoopster.com/uploads/1/3/1/8/131856770/neriwiwakixomid.pdf
    • http://files.finddallasfortworthapartments.com/uploads/1/3/0/7/130775728/5959823.pdf
    • http://files.naazneendiwan.com/uploads/1/3/1/3/131379680/6614760.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/24104233773.pdf
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/zimunuxuloxawusivumetumo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7378/8321/files/dupijoribobuwag.pdf
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/king_solomon_s_mines_2004.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/jedelu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/balopebafe.pdf
    • https://cdn.shopify.com/s/files/1/0433/2368/7067/files/zovexof.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8164/files/54882405857.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/git_push-_set-_upstream_origin_master.pdf
    • https://cdn.shopify.com/s/files/1/0437/6854/5442/files/80094789040.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9052/files/78544178368.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/osmoregulation_in_amphibians.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/wefobanuwuwabezobi.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_off0000523b.bin
0ef2a3e2f8b8236677faef5216f951827350c8e231517f103dea0621edfd2c02
pdf-font-stream PDF embedded font (sfnt) at offset 0x523B 5532 bytes
font_01_sfnt_off000064d9.bin
99b8769961a2bde30159d040307342cfc3d9682e8410def779a119ae0d36167c
pdf-font-stream PDF embedded font (sfnt) at offset 0x64D9 9980 bytes