Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f7464d23e95d1f…

MALICIOUS

PDF

46.5 KB Created: 2020-08-19 07:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5b72fef5d6f4f7e33164c3a526a4eb8 SHA-1: 28ab3cb3d931cc268783f581fe1cd6679546f371 SHA-256: 69f7464d23e95d1f214f3361961306a90dcae746fb5005d636aa649f5338dac3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure message and multiple embedded URLs, one of which is identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of numerous links suggests a link farm or phishing attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful 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.cc/pify?keyword=bandwidth+limit+exceeded+mega+jer+2+2017
    • http://dovebiso.atartisticexpress.com/uploads/1/3/0/9/130969862/01cef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/kizefo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/boladozomoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5195/7923/files/bivezusavevuzimulaladutu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5562/files/72066060621.pdf
    • https://cdn.shopify.com/s/files/1/0438/6642/3456/files/tizerupugatuxexupogu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2545/7575/files/5026782098.pdf
    • https://cdn.shopify.com/s/files/1/0431/0604/2013/files/ximijasanumeduf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/vikebu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/don_t_cry_ruel_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/61513350191.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_off0000758c.bin
dc3c88ffd7efd71a72d802d9df50640afb5f30475b7ba08f351d1a34f3e2274e
pdf-font-stream PDF embedded font (sfnt) at offset 0x758C 5864 bytes
font_01_sfnt_off00008977.bin
d3bb8d0e44c4b817bb21f5bd03e0656f72df86d882cb2d8e357bec4b2137fa8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8977 10432 bytes