Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd29d58d9f60a61…

MALICIOUS

PDF

43.9 KB Created: 2020-08-30 03:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc9478fe076d8ce7c4acb2cddf7aeca1 SHA-1: 5c5e8d5c52c5575e6c9be90cb8139eaadb114fa0 SHA-256: 5cd29d58d9f60a612d15d333214209aea7dde445f8a99cf00b3de6f496292684
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a known malicious redirector. The document body, though partially garbled, includes text suggesting a manual title, which is likely a lure. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm used to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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/wix?keyword=alzrc+devil+450+pro+v2+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_994f6c6b3b334ceca66ad99599072445.pdf
    • https://static.usrfiles.com/ugd/2e79a6_ed6e9000d93543b1872684f8040307cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6c540fb377f418ca626bf783993789f.pdf
    • https://cdn.shopify.com/s/files/1/0429/6540/1753/files/84249780680.pdf
    • https://cdn.shopify.com/s/files/1/0435/7370/6913/files/1190975091.pdf
    • https://cdn.shopify.com/s/files/1/0434/0393/5911/files/91512381642.pdf
    • https://cdn.shopify.com/s/files/1/0447/0204/0217/files/28307318232.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2106/files/kitisatezanuledo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6066/files/40609431634.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/begemojenovomowene.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/70395032256.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e39c992a4b74e0f9d33056ae11eda31.pdf
    • https://static.usrfiles.com/ugd/76156b_3c1b90d65c5f43e5bf9a27f1451f10cd.pdf
    • https://static.usrfiles.com/ugd/98e298_2d19fbc4b788401fb155d362d79e8c75.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad319baeaa3f4a14b46fe1e02621a7ea.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_off00005f4b.bin
a270fed774ba868fb44a8047ee95b1abc0f6dc55bae844e862e240584319f56f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4B 5428 bytes
font_01_sfnt_off000071aa.bin
8eaa67f355d38332dec3a7e68e8e8acea5e33204680ec4cf7cf54841ef4fc4ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AA 10236 bytes
font_02_sfnt_off000094bf.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94BF 4324 bytes

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