Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b06e574ffd043fd…

MALICIOUS

PDF

39.6 KB Created: 2020-08-31 10:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c10a11eeab681f67b08fae1f594f193d SHA-1: faf805297224580a4b7db81a818b998a1a28d05c SHA-256: 0b06e574ffd043fd0a78c6bd67d1ea85f6c1b2dcb0fbd7f415be9c79dfe8de5e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.me'. It also exhibits characteristics of a PDF link farm, embedding a large number of external PDF links, many of which are benign but serve to obscure the malicious intent. The primary malicious URL is https://ttraff.me/wix?keyword=how+many+times+a+day+should+i+feed+m, which is likely used to redirect users to further malicious content.

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.me/wix?keyword=how+many+times+a+day+should+i+feed+m
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/1c8c6c_8964d1feaa4b44d6a33514b6bba3c3f3.pdf
    • https://static.usrfiles.com/ugd/590778_a9c3f49e5ce0402e8df2e2aa17004765.pdf
    • https://static.usrfiles.com/ugd/b11f6d_7bbd32fbb4fd4074909881a5d4d5f9e8.pdf
    • https://static.usrfiles.com/ugd/cc14e4_b080b8bc23824a63b6754f872d4bd2af.pdf
    • https://static.usrfiles.com/ugd/bd5c68_03218a53ae4d471ca46d9be8dcc3393b.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/1733129711.pdf
    • https://cdn.shopify.com/s/files/1/0459/2451/5989/files/13789296586.pdf
    • https://cdn.shopify.com/s/files/1/0437/2620/9175/files/antrepo_rejimi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8400/2981/files/68682636993.pdf
    • https://static.usrfiles.com/ugd/724bd4_3b9d88d4e8fd44598237ce62f4aa17d4.pdf
    • https://static.usrfiles.com/ugd/0d2908_359e59a0bb03426b8c27090609bf0bd1.pdf
    • https://static.usrfiles.com/ugd/de65f7_fd7f0de4ee6040a9bfba36cec5fb9039.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_off00005f70.bin
201c41c385f7f99834a187bb05e13e6fbb8fc1fd05fe94556ae5c70cbd51d438
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F70 5204 bytes
font_01_sfnt_off00007108.bin
215afcf6fe83b62ca59119bf27df0998a4c0d334f393c68bc224e1fcabddc488
pdf-font-stream PDF embedded font (sfnt) at offset 0x7108 9664 bytes