Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b80f2e1d000500e…

MALICIOUS

PDF

43.1 KB Created: 2020-09-02 21:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41b8cd452bc104a3a9a62da919596411 SHA-1: c05be0721ca3fd5b926475ed1ff1378996141a9d SHA-256: 6b80f2e1d000500efcba1271b6c720d1d3f10d3febbbb9747db9db1e695c74a4
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a book title, which redirects to a malicious URL. This is a common social engineering tactic to trick users into visiting malicious sites. The ML classifier also strongly indicated maliciousness, and the PDF structure itself points to a redirector link.

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.me/wix?keyword=supply+chain+risk+management+book+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3880/1061/files/tofugamowarizone.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4280/files/kagijilikeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/weather_report_ankleshwar_gujarat.pdf
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/22931654433.pdf
    • https://cdn.shopify.com/s/files/1/0465/1266/8830/files/zikuvidesitukun.pdf
    • https://static.usrfiles.com/ugd/7ff653_f48ce86f3d574332b9db6dbb364d15d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3bcece0ea7d4d40863468a3da084ff0.pdf
    • https://cdn.shopify.com/s/files/1/0452/3288/1824/files/pusozuridun.pdf
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/73817625858.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/stock_market_analysis_course.pdf
    • https://cdn.shopify.com/s/files/1/0448/4051/7793/files/38903957683.pdf
    • https://cdn.shopify.com/s/files/1/0460/1400/5407/files/mansions_of_the_lord.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/modal_auxiliary_verb_forms.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_off0000678d.bin
15e2c1056afb5ca9a0ded2aba0c43e19862804acbdf2437fe388cd6325bbe446
pdf-font-stream PDF embedded font (sfnt) at offset 0x678D 5980 bytes
font_01_sfnt_off00007bbf.bin
f5ede298c4d11cd039f0b6d9e4c1f9061c30b5673e21aa22c591454b689dd54f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBF 10428 bytes