Malicious PDF — malware analysis report

Static analysis result for SHA-256 149fabd3f23a37dd…

MALICIOUS

PDF

58.5 KB Created: 2020-08-04 20:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47faceda238853ae9ee44396a0ef4ee9 SHA-1: 7b5c37d7fff370e352e4a01e6cf93a3a09c5cf43 SHA-256: 149fabd3f23a37ddd7dd58517db7fe63cb1436c27e5a044606dba1086940b97d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. The primary URL, https://ttraff.com/pify?keyword=american+pageant+history+book+pdf, is identified as a malicious redirector. While no scripts were extracted, the PDF structure and embedded links strongly indicate a malicious intent to redirect users to harmful content. The ML classifier also flagged this PDF with high confidence.

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=american+pageant+history+book+pdf
    • http://files.anactortravels.com/uploads/1/3/1/6/131636807/vanasatakadonagevoka.pdf
    • http://files.hilmarlumber.com/uploads/1/3/0/7/130739833/8505606.pdf
    • http://files.skski.net/uploads/1/3/1/8/131871799/fumijifivi-vosadeguguzubok-pudez-tikekadexipowa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4670/7104/files/xovezeziki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1087/files/tefoxogarosodajuxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/2716632733.pdf
    • https://cdn.shopify.com/s/files/1/0437/7922/7810/files/49070323026.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/46937123894.pdf
    • https://cdn.shopify.com/s/files/1/0432/4596/1383/files/67712432098.pdf
    • https://cdn.shopify.com/s/files/1/0430/0062/7363/files/gaduzadojobuw.pdf
    • https://cdn.shopify.com/s/files/1/0447/7625/9735/files/dimensionamento_na_administrao_pblica_federal.pdf
    • https://cdn.shopify.com/s/files/1/0431/6807/1836/files/5970019418.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49090326843.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/serum_protein_electrophoresis_interpretation.pdf
    • https://cdn.shopify.com/s/files/1/0432/4209/4755/files/8402261744.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_off00009778.bin
35b3ff08cc0bb7205941c6264af1d57cf8c840fb588d1e0c6bc804831d8bdb98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9778 5620 bytes
font_01_sfnt_off0000aa59.bin
b86e911a64897da4edafbbd0d09eb4fe6b62ce6c2bc54d88f1e12889ae2de81c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA59 10940 bytes
font_02_sfnt_off0000ce9b.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9B 4324 bytes

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