Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2c9660f868c6ec…

MALICIOUS

PDF

71.8 KB Created: 2020-08-31 04:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b30a3a0f281f08b01be275bbb1860267 SHA-1: 5d8c84af373cc19518c56796f98e4057b637ec94 SHA-256: 0b2c9660f868c6ecc1694294112951fd56210ac84d425ba6f1a1005f2c9202cd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing.

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/wix?keyword=frank+vahid+digital+design+solution+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_6dada1dcff33497a9e03ed2b0f4820b9.pdf
    • https://static.usrfiles.com/ugd/32acb1_0a4377a115d44a2c85265af4cf0d2a9f.pdf
    • https://static.usrfiles.com/ugd/ff2e72_0b55e1c018bb4a158f1526d984f07a23.pdf
    • https://static.usrfiles.com/ugd/1fa6dd_dc1e55bf682049bdabda3620938170a2.pdf
    • https://static.usrfiles.com/ugd/c33cdb_c080ce6d6b3642a29e79da7ffd4e9ae8.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/fraps_download_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0440/4009/3846/files/sittin_sideways_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0430/9339/3557/files/oceanography_notes_upsc.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6138/files/26122916335.pdf
    • https://cdn.shopify.com/s/files/1/0435/5715/9063/files/64019318795.pdf
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/apc_back-_ups_550_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7173/files/37598433739.pdf
    • https://cdn.shopify.com/s/files/1/0431/3645/0717/files/tudototukuse.pdf
    • https://static.usrfiles.com/ugd/7598fa_b623ff23d6054f13a18113d2d48c200c.pdf
    • https://static.usrfiles.com/ugd/69695d_3e1489e89d4845b9b2ec15a8ab6e7ba8.pdf
    • https://static.usrfiles.com/ugd/fa6f14_bd729a44587d44ee9cffc96517984329.pdf
    • https://static.usrfiles.com/ugd/c63dba_22aaa3ef4619470d9ac1ccd30540efbd.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_off0000caa1.bin
478ce1cfa08007996db9063b3ca8a3c6f5e21b9597d3566bab8561ee243396ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA1 5200 bytes
font_01_sfnt_off0000dc22.bin
1b28f9ce6d8e0310659525f4aaf211ec5fb8a6719b73162e9361437614688e9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC22 11916 bytes
font_02_sfnt_off00010366.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10366 4324 bytes

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