Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c23965be49c5df…

MALICIOUS

PDF

46.2 KB Created: 2020-08-22 13:38:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8822a86432ec255a789fd2bfef05f6f9 SHA-1: ba3521021dcbff154c6c1ea8cabd9a7700ac3de5 SHA-256: 01c23965be49c5dff3b9fc706e70af73e93fcea592f779479c649226f8bb8893
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to this redirector, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=word+2013+envelope+template
    • http://files.standrewsunitedpakenham.org/uploads/1/3/0/7/130738806/kojesusikuw_fokurep.pdf
    • http://zuwox.dunegrasscreations.com/uploads/1/3/1/3/131383483/todibuzimanod.pdf
    • http://pogefow.aspireinsurancegroup.com/uploads/1/3/0/7/130776131/bokuxake-detubuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5598/6326/files/76440793342.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/81338497306.pdf
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/sanoworiniwigudamiwok.pdf
    • https://cdn.shopify.com/s/files/1/0440/0090/3318/files/aluminium_alloy_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/57278438643.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/zafunijipekodisexumexixa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5650/3707/files/venetiliwupokozimivixipek.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/17601270676.pdf
    • https://cdn.shopify.com/s/files/1/0428/3885/1751/files/48480963393.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/wozipominojubaluwuzozazi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2758/5430/files/solotusono.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0629/files/bangalore_press_calendar_october_2019.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/philips_universal_remote_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4048/9122/files/lafisonelekimojigaxuxama.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/4672065302.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007571.bin
7e3589bd38749eb7a84d3f0b3a885d505a8a951ca9337a303c06ad28b16bfab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7571 5488 bytes
font_01_sfnt_off0000881e.bin
b5874def7480cd9185a7da9e1a81ea3b6cc2b6781bd61dc9ce4edc3e7e706a8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x881E 10472 bytes

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