Malicious PDF — malware analysis report

Static analysis result for SHA-256 12dab67611c446e4…

MALICIOUS

PDF

50.0 KB Created: 2020-08-31 07:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31cd4e1051bab206fcff5cec5db8b10d SHA-1: 93f0f2cc63d9a6cf47763377cedce9339dff70f3 SHA-256: 12dab67611c446e453d1854d2d2b9535ca4f700034832be78bb518512cfcf545
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Kawasaki prairie 360 review' and includes the malicious URL, suggesting a lure for SEO spam or phishing. The presence of numerous Shopify links further supports the SEO spam hypothesis, with the primary redirector likely leading to a malicious payload or phishing page.

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.com/wix?keyword=kawasaki+prairie+360+review
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/2149/2643/files/astronomy_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/vajorojefepeda.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/rozasekukapanube.pdf
    • https://cdn.shopify.com/s/files/1/0436/9616/0921/files/96859661087.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4317/files/bivewerakijuxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/zawusizakelopivonugakute.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/93751055158.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/bekogifibibupa.pdf
    • https://cdn.shopify.com/s/files/1/0447/1826/0377/files/hot_body_contest.pdf
    • https://cdn.shopify.com/s/files/1/0437/1211/8952/files/transparent_color_code.pdf
    • https://cdn.shopify.com/s/files/1/0433/9862/7495/files/meek_mills_chiraq_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/saturaniperavum.pdf
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/cultural_ecology_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/7231/4778/files/26934959519.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_off00007948.bin
8b3c2a6e6036436da7ee828e0a8ce46986eedcb8a7647965ef32a2e189a5c8a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7948 4916 bytes
font_01_sfnt_off00008a10.bin
6e1398f354f3d04bae1c1e5d087b65932a33e387a98d39f64c327ce41163d489		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A10 10188 bytes
font_02_sfnt_off0000ace7.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACE7 4324 bytes

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