Malicious PDF — malware analysis report

Static analysis result for SHA-256 03bb688e81152316…

MALICIOUS

PDF

46.5 KB Created: 2020-09-02 02:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e6105a2eb7e0c03b6619bd0e77f10ec SHA-1: 3ed590fbb80e44a9cfd255d75bb237aaabad5f00 SHA-256: 03bb688e8115231645cac1ea89d3b75f392bedf73858613c09472e039f789ef3
154 Risk Score

Malware Insights

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

The PDF file contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to creating resumes and the malicious URL itself. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, likely as part of a phishing or scam campaign.

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=create+resume+online+free+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/6d59ab_f10add8b7e4a433abea4241bac20f98e.pdf
    • https://static.usrfiles.com/ugd/63022f_4048797c793142659d924d326d3fb12b.pdf
    • https://static.usrfiles.com/ugd/510691_cc8d88f587384b959aed5596a2c1263c.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49893706483.pdf
    • https://static.usrfiles.com/ugd/3b47cb_e629f70089914b4b8a0ed6f0da41b652.pdf
    • https://static.usrfiles.com/ugd/9ec29b_b2ed9d1864e9430db2a5041679e9523c.pdf
    • https://cdn.shopify.com/s/files/1/0452/0201/4357/files/gym_exercises_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3330/files/zuzivaforasi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7110/3395/files/jiluwimi.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_off0000795a.bin
147d6a7c503780769b6515e44d60f78b7c11b45dba5b5a5484124ef292ce3aa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795A 4952 bytes
font_01_sfnt_off00008a17.bin
629ee82e27726ad2401272ad0f9c5f184e31981b50b98ffd5f982f647d154669		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A17 10352 bytes

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