Malicious PDF — malware analysis report

Static analysis result for SHA-256 40987ba582d9426b…

MALICIOUS

PDF

62.7 KB Authoring application: Poppler-utils
MD5: 7c0491502bf6307c15f8e3377f9b852b SHA-1: 419a24cfc0d12898f92296ae06a07b50379a48be SHA-256: 40987ba582d9426b13cef3fb4284b74dc17ac202a672db4dea404b801297a3ed
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic and ClamAV detection. The document body itself contains a mix of seemingly random text and URLs, reinforcing the idea that the primary function is to redirect users to external resources.

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://nycpublishingco.com/uploads/1/3/0/3/130323738/556092.pdf
    • http://madzladz.com/uploads/1/3/0/2/130289158/tibuwonogigixo-tunilezirokuju.pdf
    • http://ghstyle.es/uploads/1/3/0/3/130379210/dopunedavasizomi.pdf
    • http://barkersteel.net/uploads/1/3/0/5/130590672/berati.pdf
    • http://soulilluminations.com/uploads/1/3/0/8/130814728/nefosuk.pdf
    • http://myonlinefashionmary.com/uploads/1/3/0/5/130590224/risatizozazudigad.pdf
    • http://crazyjean.com/uploads/1/3/0/2/130289347/garav.pdf
    • http://jejamison.net/uploads/1/3/0/7/130775922/nezejugoza-biwizijexomobe.pdf
    • https://xenaremuvibepaf.weebly.com/uploads/1/3/0/6/130604716/79f70.pdf
    • http://bentcreeksolutions.com/uploads/1/3/0/4/130476462/munegakirasurolojuk.pdf
    • http://noodlecontent.com/uploads/1/3/0/4/130436289/f59b9b42e240b24.pdf
    • http://jima.adwords-about.com/uploads/2020/01/28/d51a1c7b92.pdf
    • http://colddiamnd.com/uploads/1/3/0/7/130775557/130775557.html#achilles+tendon+surgery+clubfoot

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000138f.bin
0e19e954d56e48aad06920b3256c9a0c36a99a8647380c31efaeb099be647eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138F 9232 bytes
font_01_sfnt_off0000b02b.bin
b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB02B 16036 bytes

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