Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d9dc475d62289b7…

MALICIOUS

PDF

47.4 KB Created: 2020-08-12 00:16:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a03ae383aeda1edb442b3f4de79842a SHA-1: 15c517584878d4377ea8b005ee5b41b754023d7f SHA-256: 6d9dc475d62289b7102e4b2a1b6867c264b7bbbdbfc9e765ebd7b5559e61c3d7
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 a link farm designed to redirect users to malicious sites, as indicated by the `PDF_SEO_LINK_FARM` and `PDF_MALICIOUS_REDIRECTOR_LINK` heuristics. The primary malicious URL identified is `https://ttraff.ru/pify?keyword=physiologie+du+tube+digestif+pdf`. While no scripts were extracted, the document body and heuristics strongly suggest a phishing or redirection attack.

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/pify?keyword=physiologie+du+tube+digestif+pdf
    • http://files.jewelryandwatch.shop/uploads/1/3/0/7/130775346/f7e1f1f8209.pdf
    • http://pulafeg.lifeingraceland.com/uploads/1/3/0/7/130776088/tedupu-texetefe-gesojikobezejob.pdf
    • http://files.dursleymalechoir.org.uk/uploads/1/3/0/7/130738484/vewefuga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/wenujofeviragogesod.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/13105952109.pdf
    • https://cdn.shopify.com/s/files/1/0437/9967/5041/files/jovejelimofifogibit.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/jevarejebanunanegivexaxes.pdf
    • https://cdn.shopify.com/s/files/1/0432/6850/5766/files/fadopavijilu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/88554750932.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2346/files/rarolib.pdf
    • https://cdn.shopify.com/s/files/1/0429/6835/0873/files/sedefiwow.pdf
    • https://cdn.shopify.com/s/files/1/0429/5727/5299/files/dibigepusug.pdf
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/39932189636.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/34533741852.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/juxivizosazisijisakim.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068d2.bin
139b7d79446ae20c54a020ed183e224bde3b45aa0edecb764be7e2ce1b3212db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D2 5016 bytes
font_01_sfnt_off000079f3.bin
2d4062d45a29cce801d7756d79287be2642e65b9493ef4cfda877c0e83227712		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F3 12440 bytes
font_02_sfnt_off0000a073.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA073 4324 bytes

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