Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c677a6ecaa2995…

MALICIOUS

PDF

39.3 KB Created: 2020-10-08 09:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6d45da1e2e968e065752c06b67ab7a29 SHA-1: fc9a837e6b35566272817c7237895714df1f2086 SHA-256: e4c677a6ecaa29955389fe4db9bed0ddfcf21e061e3b77244fc436dbdac1ec3e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of a link to 'ttraff.club' suggests an attempt to redirect the user to malicious content or initiate a download. No scripts were extracted, but the overall structure and URL findings point to a phishing or malware distribution attempt.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/pify?keyword=extensor+carpi+radialis+brevis+stretch In PDF document text
    • https://site-1040136.mozfiles.com/files/1040136/kijof.pdfIn PDF document text
    • https://site-1036876.mozfiles.com/files/1036876/lajomomig.pdfIn PDF document text
    • https://site-1037157.mozfiles.com/files/1037157/kinoxupaxumubemozezog.pdfIn PDF document text
    • https://site-1043829.mozfiles.com/files/1043829/walojawetipigamu.pdfIn PDF document text
    • https://site-1037187.mozfiles.com/files/1037187/29566705818.pdfIn PDF document text
    • https://site-1039695.mozfiles.com/files/1039695/jalomejofad.pdfIn PDF document text
    • https://site-1037115.mozfiles.com/files/1037115/vutanu.pdfIn PDF document text
    • https://site-1038525.mozfiles.com/files/1038525/10536353251.pdfIn PDF document text
    • https://site-1038432.mozfiles.com/files/1038432/58574405496.pdfIn PDF document text
    • https://site-1039644.mozfiles.com/files/1039644/97461680042.pdfIn PDF document text
    • http://files.motlsa.com/uploads/1/3/1/6/131606291/0f5ba9f4.pdfIn PDF document text
    • http://files.bodywisdommelaniepalm.com/uploads/1/3/1/4/131438137/2320669.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0429/2004/files/sopapowevugufi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE1 5384 bytes
SHA-256: adfc15ac6dd2258f40b27c1316595d47c6c249c4a2663209387ac82643a20faf
font_01_sfnt_off00006f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2E 9672 bytes
SHA-256: ea59277a976045d7b50ad7ac1c081a705e9782c07248b6e3d73448065d83ffc6

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