Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e36b7e14a46704…

MALICIOUS

PDF

51.3 KB Created: 2020-08-25 20:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adb342b4767067ec0bc524b5bf83cf9e SHA-1: fe1240af94130965470adc1a69381b97b1e8ef8c SHA-256: 65e36b7e14a46704b8f29d5143ec94998fe1fe7b53b1320ad952b51788e604da
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to direct users to a malicious redirector. The primary malicious URL identified is ttraff.ru, which is flagged as a malicious redirector. While the document body is heavily obfuscated, the presence of numerous links and the critical heuristic firings strongly suggest a phishing or redirection attempt. No scripts were extracted, but the PDF structure itself facilitates the attack.

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=columbia+college+contemporary+civili
    • http://files.socohomephotography.net/uploads/1/3/1/4/131482881/6770564.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58580374151.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8073/files/exploring_creation_with_general_science.pdf
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/39157747327.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/gre_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0447/6076/0471/files/20721786613.pdf
    • https://cdn.shopify.com/s/files/1/0440/0925/9158/files/hunger_games_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/cerwin_vega_vpas10_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/refajavalezepovubufuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/3469/6097/files/american_heart_association_guidelines_blood_pressure.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/kegikunusexetinulenufukis.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dcb.bin
27555089faba1bdb47d16203f551f5a2567fa67b5be93114c218277941f8eb39
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCB 5280 bytes
font_01_sfnt_off00007fb4.bin
b1f457d4b7a83f9418cb00179668b7663127632dad015bcecd98382c929aac87
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB4 13908 bytes
font_02_sfnt_off0000ab0f.bin
ccf879661c26e8d85a43d4fcfbba60320246430dcbf46b047d24072eb45b37a5
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB0F 16132 bytes