Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a9b0f3f1ed7dac…

MALICIOUS

PDF

49.9 KB Created: 2020-09-01 07:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ae164ea36b386e593c3c38d47d786dc SHA-1: dc1e3ae19c6fa1c12b3206ea3973ba3f83c972a7 SHA-256: 04a9b0f3f1ed7dacdd18bd02baf97cd7c206f66d878a62b1d6ac685f01071cf2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on static.usrfiles.com. One of these links, https://ttraff.ru/wix?keyword=bhangra+dance+form+of+punjab, is identified as a malicious redirector. The document's structure and the presence of a malicious redirector suggest an attempt to direct users to malicious content, likely for phishing or malware distribution.

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/wix?keyword=bhangra+dance+form+of+punjab
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://static.usrfiles.com/ugd/a1fb72_4575b300a2444698b094ea2ff4a98039.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_ab91fb60a8544b7786bd39a9648c9adc.pdf
    • https://static.usrfiles.com/ugd/3eed2b_64cffcd83e0047e5b8e86d02b4331a0f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a5f2dd4af0e47188c580170f612d5ce.pdf
    • https://static.usrfiles.com/ugd/89064d_99b5510bc362467f966dc6acda038855.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a4bcb5b25d54fa685ba53a4e75da3a6.pdf
    • https://static.usrfiles.com/ugd/24853a_fdd98b9e88524a6eb4b1004499b7081c.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/bilderrahmen_groformat_holz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/22718375554.pdf
    • https://cdn.shopify.com/s/files/1/0438/4315/8166/files/36164885579.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/sevadijikekujozo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71860998709.pdf
    • https://cdn.shopify.com/s/files/1/0438/2490/6400/files/mosoxogaraginefudofovov.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e75.bin
1526914181f8ed4e707c0f8511f738180933b02026ed0b84a76ed3925396c4b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E75 5624 bytes
font_01_sfnt_off00007171.bin
49493c3bf1ae5ae685640da1731e264891c76ee64278207f10d4dc0897985c1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7171 2672 bytes
font_02_sfnt_off00007cd1.bin
4f3104439abbf50884feada443f906732d506417bdbf6d677d7169729c7ff336		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD1 11804 bytes
font_03_sfnt_off0000a2e3.bin
3cdcafcd4724992fe9a9c061138fddf47a393caa83c325282de9d31ff7a42a70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2E3 16700 bytes

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