Malicious PDF — malware analysis report

Static analysis result for SHA-256 007aa68dedb89079…

MALICIOUS

PDF

43.7 KB Created: 2020-09-17 05:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac612f6c01c387574253a46f9cbe1239 SHA-1: 99b7632a610872c2935049649890a74fb97a3e97 SHA-256: 007aa68dedb8907997698b4ce03e8d54212f18f5b2d91f3d4a098c425e8fd1cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'Infinity carrier thermostat manual installation' and includes URLs that are part of a link farm designed to attract search engine traffic. This suggests a phishing or SEO poisoning attack aimed at directing users to malicious sites.

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.club/wix?keyword=infinity+carrier+thermostat+manual+installation
    • http://files.forgingdreams.com.au/uploads/1/3/0/7/130740625/fapelunowujix.pdf
    • http://dijoz.thequadstudio.com/uploads/1/3/1/6/131606490/9a22287cd8.pdf
    • http://files.annegreenephotography.com/uploads/1/3/1/3/131384429/2928189.pdf
    • http://files.neacsathletics.com/uploads/1/3/0/8/130874205/sotebowedisewe.pdf
    • http://files.transformational-school-of-essenian-arts-of-healing.com/uploads/1/3/0/7/130739916/tikopunibobijitopi.pdf
    • http://bibedi.mindbodywell.net/uploads/1/3/2/3/132303382/vejupunapuj-tuzat-viwapusivam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4c1b8f6f-d897-428a-ad30-4823a03561d4.filesusr.com/ugd/9c8fb9_cad6a33ef8c6403d9fe4a005754b468c.pdf?index=true
    • https://9ed43c42-9576-450b-98f4-ba327e981e9e.filesusr.com/ugd/158fb9_891f708bb6634cff8e4b7ca4a759edb0.pdf?index=true
    • https://4b15d451-3b84-4040-ae4e-4253431af1d8.filesusr.com/ugd/e32576_949530aa86d14a2f879aeb97fc770d6d.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/5895/3369/files/types_of_adverbs_worksheet_for_grade_9.pdf
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/gejepate.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xirapekewovefosisukepeja.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_off00006dea.bin
cb7407fcb977dd7969ede4bed21953d76d1db4bd5ddb04ea99767cba23b2ca70
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEA 5160 bytes
font_01_sfnt_off00007f5c.bin
c145438ed34035ede51a306e06bfed09dcbb892b9177b953c77b3aa892999e17
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5C 10128 bytes