Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e6bc3821286dfc…

MALICIOUS

PDF

48.5 KB Created: 2020-09-03 00:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f46f5c64bd6e74e454890d9707179ea5 SHA-1: b6a4e541551d5a7ac080579742ee6224244d7ac0 SHA-256: 46e6bc3821286dfcf9578fee356e3304caec58ee2d237cb43c15e82fb0611de1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a malicious redirector link disguised as a download for 'hd voice recorder pro apk'. The PDF also hosts a large number of external PDF links, likely for SEO manipulation or to distribute further malicious content. The primary malicious URL identified is ttraff.ru, which redirects to a page related to the lure.

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=hd+voice+recorder+pro+apk
    • https://static.usrfiles.com/ugd/111c46_ab572a3f7d4e4083afe0193fe456bf50.pdf
    • https://static.usrfiles.com/ugd/eaf48f_5b20d4874f4847a28ead97fbb49f880d.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_5add591ff0344a069d2a5ec79b18ca30.pdf
    • https://static.usrfiles.com/ugd/4bb894_657b520801f34083b72e6c5ef191f270.pdf
    • https://static.usrfiles.com/ugd/cc089a_08e647ed468a447c9de15aeda1ebdec1.pdf
    • https://static.usrfiles.com/ugd/3f80ec_15be43315c7649dd801faa5af73fe71a.pdf
    • https://static.usrfiles.com/ugd/79e0dc_b5647f1739a84f66960049875a4a73ef.pdf
    • https://static.usrfiles.com/ugd/e745be_3e3dabc4974e49cebba7809fc8129c33.pdf
    • https://static.usrfiles.com/ugd/b8c837_21485fa6f9214a2188425a7cfd558307.pdf
    • https://static.usrfiles.com/ugd/07625c_bfc3590ff5f9489682399bd2f130929c.pdf
    • https://static.usrfiles.com/ugd/50c35f_68e9104c52ea4337833954c33ddd5448.pdf
    • https://static.usrfiles.com/ugd/26938b_f7814f1cdb8140d2b918f4a1e5421717.pdf
    • https://static.usrfiles.com/ugd/89363e_a7255256b6984cf2af240cc662c734f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_6cc8e483236b4629a2d83a1a97a25f86.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000610d.bin
8663ce821c182141bacecdbe4a85843b272196d597e4a6d3754192e53bf9c071		 pdf-font-stream PDF embedded font (sfnt) at offset 0x610D 4940 bytes
font_01_sfnt_off000071e6.bin
aaf5dfb5118221ac482a96ed5c4c83d74d47c97130c6f9eadd2fc6b170037092		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E6 1872 bytes
font_02_sfnt_off00007af5.bin
45cd2186b522e2c041ba5bd28c8b74b673443b872d9a8dab23bac996a6308e8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF5 10588 bytes
font_03_sfnt_off00009f7a.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F7A 16092 bytes

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