Malicious PDF — malware analysis report

Static analysis result for SHA-256 7845d75270e8fd65…

MALICIOUS

PDF

45.9 KB Created: 2020-07-31 16:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f543bf6cf18013f27bbf09d0b8aae2e4 SHA-1: 19b5907b454932fa962eb318bac78ffda049959b SHA-256: 7845d75270e8fd6566959e5d9cb1ab3913031692889660894160584b729b6da3
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination and potentially deliver a malicious payload. The document body, though heavily obfuscated, contains text related to 'Fe to rf minecraft' and the URL, suggesting a lure. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm strategy, potentially for SEO manipulation or to host further stages of an attack. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/pify?keyword=fe+to+rf+minecraft
    • http://files.honestlycleanllc.com/uploads/1/3/1/6/131637240/numuvakegan-tovisalamuvuwir.pdf
    • http://files.futureslps.com/uploads/1/3/1/4/131406701/dapomawukasuwupip.pdf
    • http://files.williammonaguenativeart.com/uploads/1/3/0/7/130739747/vunidegote.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5300/7516/files/87952433666.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/83512648873.pdf
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/zaroliralexojex.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/97765736656.pdf
    • https://cdn.shopify.com/s/files/1/0432/1188/2653/files/zujejivatuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/85395141981.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/82016781593.pdf
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/7796928866.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/foritugavugujewifexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4313/5393/files/49858420692.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/25955870728.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/varizibusuxojam.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_off000070cf.bin
64bf1c3a716f46542a589d4e2afd401562b08715dd19e96712317dba8cd88754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70CF 4772 bytes
font_01_sfnt_off000080f4.bin
180be8dd921af0f1730f822c824b65e4b90a68806819d75003a69c6537bb6aad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F4 13308 bytes

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