Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4d6e4f241fa829…

MALICIOUS

PDF

40.3 KB Created: 2020-08-21 01:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d847f2c3232af1ef72376fdc95f862c SHA-1: 2a84e909db6e61a38f23817bb9bb5100f16e2037 SHA-256: 2b4d6e4f241fa82946b968d36fc682a8b2cce20e5d057cb2f2b6c36b7a650acd
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of many external links, including those hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and click-through rates to malicious sites. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.ru/pify?keyword=flowcharts+and+pseudocode+questions+and+answers
    • http://files.wellwednesday.ca/uploads/1/3/1/3/131380504/60da88.pdf
    • http://joxonid.byptrampolines.com/uploads/1/3/1/3/131379730/6427354.pdf
    • http://files.eastfallsfarmersmarket.com/uploads/1/3/1/0/131070080/tumifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/5842715335.pdf
    • https://cdn.shopify.com/s/files/1/0432/3255/9267/files/87463896104.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jenodilibaxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/33474337652.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/givofubizitevo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/mevefugizererutoxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/98699629235.pdf
    • https://cdn.shopify.com/s/files/1/0433/5871/6055/files/47728015882.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/wozifuzigave.pdf
    • https://cdn.shopify.com/s/files/1/0433/5307/9963/files/sound_of_silence_sheet_music_piano.pdf
    • https://cdn.shopify.com/s/files/1/0437/8276/6743/files/bsnl_landline_bill_view.pdf
    • https://cdn.shopify.com/s/files/1/0434/7117/5846/files/61216180721.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zokiwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3822/9158/files/83412667369.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_off00005157.bin
d230a303e3ea6f415cc670fbee8d700dac5e8f7e4e98fb8a6f28cb8eafdd1a69
pdf-font-stream PDF embedded font (sfnt) at offset 0x5157 5216 bytes
font_01_sfnt_off00006314.bin
a667d7535e632b606bb4576f65d5faf0ad712065b5528800ce34c52c850dd85d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6314 10224 bytes
font_02_sfnt_off000085e4.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x85E4 4324 bytes