Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba1c5653a89f908…

MALICIOUS

PDF

42.2 KB Created: 2020-08-02 15:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e3e0cac012f79727b45438a9b29681a SHA-1: 315d308031b63de814336a7ed110052515b47895 SHA-256: 5ba1c5653a89f9082c11039f737dfdfd80e7539a166e16d912b942852d483f58
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a link farm, containing a large number of embedded URLs pointing to other PDF documents. One of these URLs, 'https://ttraff.ru/pify?keyword=time+lost+proto+drake+spawn', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent, possibly for SEO manipulation or distributing further malware.

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=time+lost+proto+drake+spawn
    • http://files.logans-heroes.org/uploads/1/3/0/7/130739614/700476580d51.pdf
    • http://files.deerbrushdesign.com/uploads/1/3/1/4/131453432/kamugilikikavuxoje.pdf
    • http://files.yeastlipidconference.com/uploads/1/3/1/0/131070861/70f63.pdf
    • http://files.13gfab.com/uploads/1/3/0/8/130814121/584f7e9b58746.pdf
    • http://files.gilliantorckler.com/uploads/1/3/0/8/130874629/gomenevidi-kinepowa-xasokipa-xupuzateseroji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/silixogexazowitakupav.pdf
    • https://cdn.shopify.com/s/files/1/0436/6955/3305/files/59271500058.pdf
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/sipawajamunopuvot.pdf
    • https://cdn.shopify.com/s/files/1/0435/2606/2239/files/13450465630.pdf
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/gezujirimuleviji.pdf
    • https://cdn.shopify.com/s/files/1/0432/8348/0736/files/rarawafeburimimiruvep.pdf
    • https://cdn.shopify.com/s/files/1/0437/5959/9765/files/degepeguvefa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0560/8099/files/2008_honda_fit_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0503/files/46339083598.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_off00006786.bin
7ec8f2df4276e84f8f66605eba7a0451bb8ab3f2682d8de00688927627a52421
pdf-font-stream PDF embedded font (sfnt) at offset 0x6786 5208 bytes
font_01_sfnt_off00007934.bin
99ea5a94d94e578e7b432fb942214a6c7037449010d4b0caf047ddeff780af31
pdf-font-stream PDF embedded font (sfnt) at offset 0x7934 10308 bytes