Malicious PDF — malware analysis report

Static analysis result for SHA-256 b937ad7e00c8bab6…

MALICIOUS

PDF

40.3 KB Created: 2020-09-03 05:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2293ca18bdd90dfdf3e21e4baeb64725 SHA-1: 524309f5d723cdb6d182bcddaa9fcee0a5a1c42d SHA-256: b937ad7e00c8bab6ac7768b7516b613ba5252592fe7f3b46c0bc25b21a718781
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.me, which is disguised as a tool to bypass Apple ID restrictions. The document body and embedded URLs reinforce this lure. The presence of a link farm heuristic suggests a broad distribution attempt, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer the malicious intent.

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.me/wix?keyword=apple+id+bypass+tool+free
    • https://static.usrfiles.com/ugd/943725_83e3a92f243a4f228d850ad107485922.pdf
    • https://static.usrfiles.com/ugd/e4ff69_c9fd5baf615743c280006130a1ad9aa3.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ea207f4971d409092a5405c628b3714.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed2611ed69e142f2a28598a3986cfe9d.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/37007948571.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0021/files/mamovulozixaliwugibifid.pdf
    • https://cdn.shopify.com/s/files/1/0436/9373/6089/files/86984305735.pdf
    • https://cdn.shopify.com/s/files/1/0434/7445/2632/files/jerufunazeluwuwoje.pdf
    • https://static.usrfiles.com/ugd/d13e1f_91514f6a6aec4ef8a43019eef44ccfdb.pdf
    • https://static.usrfiles.com/ugd/9d66c7_840dac9c3ac8498f962a505097ae54fd.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_72c6a5c269874468922510026b55154f.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_off00005fac.bin
913db569e5e1c10326b465c7836a17d67077c10383c0494977f0740984327b6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAC 5264 bytes
font_01_sfnt_off000071a6.bin
d96bd5f350bd3f2827723a3efcfd7dbea43bd41c3f306d92331bd33b1f2d8a45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A6 10340 bytes

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