Malicious PDF — malware analysis report

Static analysis result for SHA-256 0195cb639d3e3701…

MALICIOUS

PDF

53.0 KB Created: 2020-08-31 11:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa845aaecba74eb4212c5a24212425b4 SHA-1: 1ecbf7520ea789845bd1d098987ab1a75863e251 SHA-256: 0195cb639d3e3701a6702419dafa8c81eb17bd2115a55e59f0bca12a17d6f1a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a manual for a Qyt kt-8900d device. This URL is likely used to deliver a secondary payload or redirect the user to a phishing site. The PDF also contains a large number of external links, many of which point to benign content, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious 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.ru/wix?keyword=qyt+kt-8900d+manual+pdf
    • http://dqx.file1.site/download?file=qyt+kt-8900d+manual+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/822ecd_348d34e3ef67480aa5ce710e8f4b2d69.pdf
    • https://static.usrfiles.com/ugd/4479ed_2997960ae8f24f9f8e7082472b0746ea.pdf
    • https://static.usrfiles.com/ugd/e1c37d_d72e7f2e778e444faeb3cc4d04e97c3c.pdf
    • https://static.usrfiles.com/ugd/2813e2_90a0fb465c8742ee8f64e22657d1bef1.pdf
    • https://static.usrfiles.com/ugd/87a178_26e4593631f248f89e9232e49076e2f6.pdf
    • https://static.usrfiles.com/ugd/1e32c2_6799b0780b0441a58daa261a4968d9ef.pdf
    • https://static.usrfiles.com/ugd/0aab01_8923993787504e13b36b20e32aab68e0.pdf
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/xixufupudekufoxeve.pdf
    • https://cdn.shopify.com/s/files/1/0432/0516/5216/files/conjunction_worksheets_with_answers_for_class_8.pdf
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/types_of_tempering.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_bfb69b705bfd4930a6ec25efc52507e9.pdf
    • https://static.usrfiles.com/ugd/3f80ec_5cc929c8d3284189973aaf70e5f42a2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ffec7ef8bf841e1aef717cf53b69edb.pdf
    • https://static.usrfiles.com/ugd/b8c837_d96dc23e41924441aee5257b99493eda.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_off000082d8.bin
95873c6658170c5ef06105577bf97c915a6273d3b0fa923e75894a6ed77b3a6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x82D8 5664 bytes
font_01_sfnt_off00009628.bin
147e1433bc8f6eaff694ff2604d4608ce59234a25b1ac284971662f275e065ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x9628 16144 bytes