Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ee04d396bb7e73…

MALICIOUS

PDF

63.4 KB Created: 2020-08-02 14:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16c3e2b7baeab562fb572e1a37a24fae SHA-1: 2307cc83403b99c639c98d0be97278f949739792 SHA-256: 72ee04d396bb7e7365910e9eb9fa3ea8969333b53f17ce5f75b7e5957cb754ec
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The document body contains garbled text but includes the malicious URL, suggesting an attempt to lure users to a compromised site for further exploitation.

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=potion+of+lead+skin+gungeon
    • http://files.kasr.ca/uploads/1/3/1/4/131453682/5211588.pdf
    • http://files.scottpetersonappeal.org/uploads/1/3/0/8/130873807/e74dd.pdf
    • http://files.thesolidrockshop.com/uploads/1/3/0/8/130813797/zaxisufibuxuxigusi.pdf
    • http://files.huntersroots.com/uploads/1/3/1/8/131871864/lajakareseb_mixetenijo_xegosebiva_tojel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/46649823567.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7070/files/tedewid.pdf
    • https://cdn.shopify.com/s/files/1/0435/3461/4688/files/podagidokozelemew.pdf
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/1035029860.pdf
    • https://cdn.shopify.com/s/files/1/0430/6776/8981/files/13049373188.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3537/files/31062443558.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/31451450040.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/tamujufenuxolisemapeduvax.pdf
    • https://cdn.shopify.com/s/files/1/0437/5832/1818/files/karulinosiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0429/files/ribowosesiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/radokugiwerotaves.pdf
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/40089086142.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/47818577119.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae77.bin
5e311e07bdddb06d91e56f2a58529a5a61ededc551987a7775fa5fe86048bbb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE77 4928 bytes
font_01_sfnt_off0000bf4c.bin
7994c5585f8ae4c6c5aa19656cb4baab33d88f452a502c0fa37dec9e70d8bfc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF4C 10276 bytes
font_02_sfnt_off0000e25c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE25C 4324 bytes

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