Malicious PDF — malware analysis report

Static analysis result for SHA-256 adeb527d6da94089…

MALICIOUS

PDF

54.4 KB Created: 2020-08-30 04:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1e1bdd9055bc8986b59e3e89a8bb1db SHA-1: 7060e93d52da5daab2231450be87aa488b95c0e0 SHA-256: adeb527d6da94089435d5db98ac71e5c12403606bef6d482ed56e6c477cfc967
152 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of a link farm and a redirector suggests an attempt to lure users to malicious content, likely for phishing or malware delivery. No scripts were extracted, and the document body was heavily obfuscated.

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.com/wix?keyword=cd+de+reggaeton+old+school
    • https://cdn.shopify.com/s/files/1/0430/7478/1338/files/waste_to_energy.pdf
    • https://cdn.shopify.com/s/files/1/0435/5047/4403/files/29613054228.pdf
    • https://cdn.shopify.com/s/files/1/0431/6967/7474/files/stop_code_irql_not_less_or_equal.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/21144018463.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/tewagapexugasinojolobare.pdf
    • https://static.usrfiles.com/ugd/9219f8_9c24eced67b8423bb43175970d9cc0e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_00019555e78f499daa8fb10badac18db.pdf
    • https://static.usrfiles.com/ugd/314c35_fbba2843be7049098c24fe0f841348cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_d345e268873f4e8cafee38c42d1886bc.pdf
    • https://static.usrfiles.com/ugd/d3758e_0c2ccaec1b7941508d68ac3e30f396d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_ddcf71396a3c463a99180d85e72960ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_d89f4c1daefa4a51ba6be8fbc032956c.pdf
    • https://static.usrfiles.com/ugd/87a178_13268178e1c7445ea0b246b06b2e91b4.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_off0000644b.bin
10c08b9c26dec14bbf570957a4b2841ec1f1f8154754404e5dce18902c4b7106		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644B 5104 bytes
font_01_sfnt_off00007593.bin
b5554b11daf8569266ff18e89599a7a1733bcee794227080c99b82bc5e2b639d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7593 5064 bytes
font_02_sfnt_off0000844d.bin
35ecd46b29fb98b2d838001cde545901fea67c1763d98bae26df189902fd5381		 pdf-font-stream PDF embedded font (sfnt) at offset 0x844D 15844 bytes
font_03_sfnt_off0000b5e6.bin
d26fdce492fb9e8c49f527e3a91555393c735dd4d56e489be838b86a3f7c22b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E6 16488 bytes

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