Malicious PDF — malware analysis report

Static analysis result for SHA-256 0304c3f31aea5584…

MALICIOUS

PDF

43.6 KB Created: 2020-08-01 01:18:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55758178ad90bc1dcf47e096d51deff0 SHA-1: 469f079ba90f986f710702431e5ffcdbd8a09dda SHA-256: 0304c3f31aea5584a190f6445c8f2575a8b8af24e4c189f1d77a2ff1d767571a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms and redirectors, indicating a phishing or scam attempt. The primary malicious link identified is https://ttraff.cc/pify?keyword=logitech+trackman+marble, which is presented as a search result. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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.cc/pify?keyword=logitech+trackman+marble
    • http://files.debattierclub-muenchen.de/uploads/1/3/2/6/132680905/bapetaravav-gisugetem-dunadovidekon.pdf
    • http://files.pintolab.com/uploads/1/3/0/7/130775220/fatejelubena-gaguwuw-jiwotuminata.pdf
    • http://files.lauribenblattconsulting.com/uploads/1/3/1/3/131398573/b3488.pdf
    • http://files.psychologycenterofaustin.com/uploads/1/3/0/8/130873795/1249532.pdf
    • http://files.stephenfernez.com/uploads/1/3/2/6/132682640/gerokete_menijonalor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1740/3549/files/62860280019.pdf
    • https://cdn.shopify.com/s/files/1/0429/4616/6943/files/bajon.pdf
    • https://cdn.shopify.com/s/files/1/0431/1954/2434/files/67622780505.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9434/files/rizufilawefefadasafekap.pdf
    • https://cdn.shopify.com/s/files/1/0432/8819/9328/files/1566208520.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54686169254.pdf
    • https://cdn.shopify.com/s/files/1/0436/3704/7449/files/cash_book_format_in_excel.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/71940458149.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/95315451996.pdf
    • https://cdn.shopify.com/s/files/1/0431/2976/6039/files/92408329583.pdf
    • https://cdn.shopify.com/s/files/1/0428/5962/6655/files/44868918506.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/95167822872.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/wusamuzawuvirisiduzi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1523/2923/files/2760478027.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068ff.bin
c29a60833357b9ac3464898e7900c81651a4508127cbc4fbe91ecc87666defbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68FF 5180 bytes
font_01_sfnt_off00007a7f.bin
cd52a850fc42d34ab1294276d5edfe567323709a48c19b10f5a732a2efdeb66d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7F 10988 bytes

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