Malicious PDF — malware analysis report

Static analysis result for SHA-256 47dddd068285a981…

MALICIOUS

PDF

35.8 KB Created: 2020-08-09 16:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7c5ce6ca99990fcb954f769a7efbaab SHA-1: e64b26ec624ce78b95d6d26f54d23784924b7090 SHA-256: 47dddd068285a98125bc8f8e78ea583730a79bb66b38865839c3b2733faade02
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is indicative of an SEO link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=print+pdf+book+double+sided'. The document body, though heavily obfuscated, contains text related to printing PDFs and references the same redirector URL, suggesting the primary goal is to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

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=print+pdf+book+double+sided
    • http://files.absoluteunderstanding.org/uploads/1/3/1/3/131383943/7200d787.pdf
    • http://files.avensys.co.kr/uploads/1/3/0/8/130813601/5891987.pdf
    • http://files.mixelle91.com/uploads/1/3/1/4/131454521/texekuzeza.pdf
    • http://files.messagesfromthewoods.com/uploads/1/3/1/0/131070866/570f7a328ff.pdf
    • http://files.thelakeway.org/uploads/1/3/1/1/131164573/9691138.pdf
    • https://cdn.shopify.com/s/files/1/0431/8714/2818/files/44818031935.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96512150342.pdf
    • https://cdn.shopify.com/s/files/1/0434/8149/7766/files/jewukumerexudan.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3568/files/divergent_allegiant_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/8336/5528/files/7739806131.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/monalidorefefebogimasoni.pdf
    • https://cdn.shopify.com/s/files/1/0435/9821/7374/files/gudaxetesefetijoted.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/noledopatevoraraju.pdf
    • https://cdn.shopify.com/s/files/1/0444/6240/7847/files/pathogenicity_of_fungi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7674/7413/files/certificado_de_preparatoria.pdf
    • https://cdn.shopify.com/s/files/1/0440/7987/4213/files/fexebigogukobiwul.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/gafunufirufogi.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005101.bin
100125ee6ae659cf24b2b974360b1a3e46555f4fe53a80baeac8d11f980cf8c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5101 5032 bytes
font_01_sfnt_off0000622d.bin
d92634c658414a6c2496d50b00a61902343786b7157e23dc73d552aa0b346cb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622D 9420 bytes

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