Malicious PDF — malware analysis report

Static analysis result for SHA-256 64417c65df990a35…

MALICIOUS

PDF

42.2 KB Created: 2020-08-30 05:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c58578746b4272aca1b894fca491613 SHA-1: 6a0c6b9eef5fb1ac4dda19e871c4e6adf1b3510e SHA-256: 64417c65df990a350e11d0414765219f73356fae4412997e485ad4b392ecc61f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link to a known malicious redirector, ttraff.club, which is likely intended to lead the user to a malicious site. The document also contains a large number of embedded links to external PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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.club/wix?keyword=knock+em+dead+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/66c878_b861c067edb346dda1340b7175108a49.pdf
    • https://static.usrfiles.com/ugd/b8c837_409c019efa9f4aa28a7a617c0d06b294.pdf
    • https://static.usrfiles.com/ugd/60933b_c984575c44224fa38779bf1923c77353.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_f35fd5398eb24716bcdff76b018cb2cc.pdf
    • https://static.usrfiles.com/ugd/db1da1_71d712e18445468ca32179f4f96a0657.pdf
    • https://static.usrfiles.com/ugd/b8c837_335e42b09e474ea6aae944e6a41eac6f.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/26255312160.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0309/files/non_uniformly_accelerated_motion_examples.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7633/files/zuzulizogodurevakanogud.pdf
    • https://cdn.shopify.com/s/files/1/0435/4428/1247/files/41738089196.pdf
    • https://static.usrfiles.com/ugd/79cb75_4e81f01136524642aedd52669bf05f7a.pdf
    • https://static.usrfiles.com/ugd/299074_b9de23393d6f4968ad7dacf5391fdacd.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e0498905ca24b85803a9b1034aec93a.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_off000065ab.bin
5c723a1b9ac42ca86ba9f8d450d7c7edfb3bcf7f09a7132ecc70a31ec530f664
pdf-font-stream PDF embedded font (sfnt) at offset 0x65AB 5028 bytes
font_01_sfnt_off000076b4.bin
9484675e5ea489784e22ea7385f1bd4c2fd9ed47c8c40185a9136d7a45a63368
pdf-font-stream PDF embedded font (sfnt) at offset 0x76B4 10596 bytes