Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f86ff451e59df9…

MALICIOUS

PDF

58.9 KB Created: 2020-08-09 11:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a272367f2b6b307ac29acfa15e6684e SHA-1: 6df500edec8d297582f6424b0f36ef95617be16b SHA-256: d0f86ff451e59df9599d9ff78b6f8242022e408ffd3703131d17852e4698c619
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains multiple embedded links, including one that redirects to known malicious infrastructure. The presence of a 'download button' heuristic further suggests a social engineering lure. The document body, though heavily obfuscated, contains URLs that are likely part of the redirection chain. The primary attack pattern involves tricking the user into clicking a malicious link, leading to a potential second-stage download or exploit.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=brachial+plexus+injury+management+pdf
    • http://poluvuj.hoffmannlabradors.com/uploads/1/3/1/3/131398140/420d479e537.pdf
    • http://files.pampervanbeauty.com/uploads/1/3/1/1/131164033/ed3bf.pdf
    • http://relewiri.bttau.com/uploads/1/3/0/7/130776445/kugogakij.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4269/files/89590008152.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/53394862833.pdf
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/zodaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0800/0163/files/potatix.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8871/files/xejavujodilotufemu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6487/6444/files/proyecto_ley_presupuesto_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/0849/9618/files/wijekurapodi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/automate_the_boring_stuff_with_python_github.pdf
    • https://cdn.shopify.com/s/files/1/0450/4194/2678/files/minecraft_shovel_enchantments.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_off0000a80b.bin
e609d60bce704f4a2058994163127522f27ed9fcc106b31497f66b743489c4df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA80B 5864 bytes
font_01_sfnt_off0000bbef.bin
23ba2a04525365dc4265afff698dba93ef26edac727395d3c8656cfd12257381		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBEF 10208 bytes

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