Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa29347f14c5f6f…

MALICIOUS

PDF

44.9 KB Created: 2020-08-24 04:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48b40cde5b251dea7682ded40bcb95a5 SHA-1: e1313434002d287822c80efa34e02422b814ef43 SHA-256: 6fa29347f14c5f6f5eb8439074db68944ef29e63ba108db4ae19ced9ecd3b567
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to potentially malicious redirectors or link farms. The primary malicious URL identified is a redirector designed to lead users to further malicious content. The document body, though heavily obfuscated, contains references to URLs that are likely part of this redirection scheme.

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=eng+vs+nz+3rd+t20+pitch+report
    • http://roberu.prestwoodplayers.com/uploads/1/3/1/4/131406149/1980210.pdf
    • http://files.mgss.com/uploads/1/3/1/1/131163747/459984.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0461/9832/5399/files/ibps_clerk_syllabus_2018-_19.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/kiwitexomenasi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/healing_herbs_and_spices.pdf
    • https://cdn.shopify.com/s/files/1/0430/4456/9242/files/16092083092.pdf
    • https://cdn.shopify.com/s/files/1/0429/9984/0921/files/answer_to_thank_you_for_gift.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/seruniribamax.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/61713046487.pdf
    • https://cdn.shopify.com/s/files/1/0437/0785/9096/files/how_do_i_flip_a_video.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9544/files/lobote.pdf
    • https://cdn.shopify.com/s/files/1/0437/2781/4805/files/walmart_donation_request_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/5241/6672/files/xamexenebej.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_off00006147.bin
8db2caf8dd16a393e6e2c37d015ef702a2046bedf94908c0331c74b589a0abd4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6147 5388 bytes
font_01_sfnt_off0000739c.bin
a0bbb1ffd4d349bed7fe2abe3df5a1d2005d10ed29575a5f4e999148448d8646
pdf-font-stream PDF embedded font (sfnt) at offset 0x739C 11128 bytes
font_02_sfnt_off0000988e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x988E 4324 bytes