Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac46e8979851db4…

MALICIOUS

PDF

62.6 KB Created: 2020-09-02 02:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2245ed33b166af3f6aa08914872025f SHA-1: 689b40157d3135790790c0ca1533399d48918b6c SHA-256: 5ac46e8979851db4ee1d55b45efc59fd8535361733e47ef72c32fb50d1d70f8e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents. The document body, though partially corrupted, contains text related to 'Neonatal resuscitation guidelines 2018' and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=neonatal+resuscitation+guidelines+2018+%25E0%25B9%2584%25E0%25B8%2597%25E0%25B8%25A2
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/07e02c_7816358ae55b4f3c9d7e9dffcb06410c.pdf
    • https://static.usrfiles.com/ugd/be19e1_d96ac83ec5244265b430f59535af7fdb.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7980357f7b346768abc43f292b356c5.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/dasonizibinufosu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6645/7254/files/69487454770.pdf
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/bowling_green_state_university_map.pdf
    • https://static.usrfiles.com/ugd/739437_948f230acda445229f457a638154def7.pdf
    • https://static.usrfiles.com/ugd/f0e51d_9a1493720c514fe5b543bcc9352eabef.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7500/files/bopawalafiwekiratej.pdf
    • https://cdn.shopify.com/s/files/1/0432/2610/3971/files/bidakutirafivovebekejix.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://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009446.bin
9a3e254c3d7b359fdf54cebac831ec7158682c4e18ce72963cdc46c7bfe1ba91		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9446 14412 bytes
font_00_sfnt_off00007108.bin
b438c535a859e069174ad71e38b10c92e10025d1e7fe469a956f4088588bd319		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7108 5596 bytes
font_01_sfnt_off0000841e.bin
08ce0554153cac69faba3c2f887cfcd0c27b24fdc8b4ba4516b971ae9aa68d8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x841E 6228 bytes
font_03_sfnt_off0000bc2a.bin
ec7d5cecadbace192efc5778ff954e4327f8e6666a211568e0c0b4e7a591b45f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC2A 14884 bytes

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