Malicious PDF — malware analysis report

Static analysis result for SHA-256 f77ca1c59ae05811…

MALICIOUS

PDF

59.0 KB Created: 2020-08-29 12:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d7b56504caf0e40f285653617247647 SHA-1: 843298ae270762cbf72609a29dfa95fa45e38afa SHA-256: f77ca1c59ae05811664ce8f0a94dfe9b3f090c4ccad12dafa6171aceb6310024
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/wix?keyword=the+wiz+michael+jackson', is flagged as a known malicious redirector. The presence of a link farm and a malicious redirector strongly suggests an attempt to lure users to malicious websites, likely for phishing or malware distribution.

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=the+wiz+michael+jackson
    • https://static.usrfiles.com/ugd/e745be_144d66becc5a4e97b8d01d04f242d2f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0cd584adfd84226944bf179f5467e41.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc0a1e00c05c47cbb3a4919759a81a06.pdf
    • https://cdn.shopify.com/s/files/1/0429/4996/8035/files/carrom_pool_hack_mod_apk_techstribe.pdf
    • https://cdn.shopify.com/s/files/1/0437/5638/8506/files/search_fors.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/lafitozilav.pdf
    • https://cdn.shopify.com/s/files/1/0457/5651/4460/files/uv_mutagenesis_lab_report.pdf
    • https://static.usrfiles.com/ugd/b8c837_915199595cb647fd8b5674d56b072ac8.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad6e21d7e3ce49388fc88c2ab706dea2.pdf
    • https://static.usrfiles.com/ugd/b8c837_5277eca5a5074731b7d767ee6dcde841.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a96a.bin
46261a5adb227d21959b45014979b58bfd0b9675120ca1e5c1905b0652ca6b80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA96A 5176 bytes
font_01_sfnt_off0000bafe.bin
eb1083e2c9c740302eef6038dcf565617c50e6ef59e1dd8987ab59f1c9144c5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAFE 10772 bytes

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