Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce96ae908d3c5f4…

MALICIOUS

PDF

38.9 KB Created: 2020-08-15 06:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5ef668269de52c8188b696914f3f6f1 SHA-1: 002fcfcd61e5d922ae0fa499202cd0b1a3db24f5 SHA-256: 0ce96ae908d3c5f404dde7de463b2aaf219f738815fda2bf4d7b51e0913e950c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'Cisco finesse desktop user guide'. The presence of a malicious redirector suggests an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=cisco+finesse+desktop+user+guide
    • http://files.riohondobaptistchurch.org/uploads/1/3/1/3/131379639/jububexutezebefozi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/thousand_miles_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49816413057.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7873/files/48531074347.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/74557017840.pdf
    • https://cdn.shopify.com/s/files/1/0438/8188/9960/files/the_knight_s_tale_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0429/2011/6387/files/gartner_report_on_cloud_computing_2018.pdf
    • https://cdn.shopify.com/s/files/1/0437/4413/3281/files/74352595370.pdf
    • https://cdn.shopify.com/s/files/1/0445/6284/1759/files/body_language_in_business.pdf
    • https://cdn.shopify.com/s/files/1/0430/0328/1571/files/the_arbitration_act_1996_a_commentary.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/dipez.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/peduroborotus.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_off00005a0c.bin
d6c28da534b9ea2401fa7079925f03ffb65031b1539f0efbb7c76aebac789fed
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0C 5048 bytes
font_01_sfnt_off00006b4c.bin
eea260534bd2e467f08b41c7395df5b853feb928c203d2c7af37fd09544d8286
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4C 10384 bytes