Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a8919f2f678f6c…

MALICIOUS

PDF

43.2 KB Created: 2020-08-03 15:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfe2c95dd9001faa22afa77598747973 SHA-1: dcc963c9eda0688cc7e63bf5132ef84cadb1fb78 SHA-256: d2a8919f2f678f6c936948a5e7d28488a1b61505477cca28ec237e05b6caf19f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to `https://ttraff.ru/pify?keyword=list+of+all+continents+and+their+countries+pdf`. This technique is often used to obscure the final malicious destination and evade detection. The ML classifier strongly indicated maliciousness, supporting the classification of this PDF as a malicious redirector.

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=list+of+all+continents+and+their+countries+pdf
    • http://files.venueonthesquare.com/uploads/1/3/1/3/131397955/cf1959.pdf
    • http://files.moscofilia.com/uploads/1/3/1/4/131453251/6954ff6f936e.pdf
    • http://files.australianamateurperformercompetition.com/uploads/1/3/1/3/131379211/5704048.pdf
    • http://files.abandonedbutnotforgotten.net/uploads/1/3/1/0/131070602/liwotawavurozora.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8136/files/76776280879.pdf
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/effortless_mastery_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/68598236846.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/pevukufi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/wajumilavomojibezosisov.pdf
    • https://cdn.shopify.com/s/files/1/0447/6433/2181/files/download_breaking_dawn_part_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/pufesolagiriravigufurona.pdf
    • https://cdn.shopify.com/s/files/1/0430/0675/4970/files/durufipukebesenox.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/36367731299.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/gozolulogonurobuvisenisad.pdf
    • https://cdn.shopify.com/s/files/1/0431/9582/6336/files/nezagubuganudoxewebake.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8511/files/bupufonipi.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_off00006ab4.bin
218069390181b3d9bd4dd35e8107a65f703490027fcbeaae0ff6220fa2004a49
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB4 5184 bytes
font_01_sfnt_off00007c50.bin
353d7a487da4c6f07ca975329a560c2023c77f0a9ad0b63d7546e787a3b11499
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C50 10436 bytes