Malicious PDF — malware analysis report

Static analysis result for SHA-256 86263da10f05fd24…

MALICIOUS

PDF

40.7 KB Created: 2020-08-20 23:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0812aa09ed9c33e8a1dc0da516a02a8b SHA-1: d90648abba299c826a62df14b21ad6f1aede6054 SHA-256: 86263da10f05fd24bf1f943b287ca52dd2540c118e25428dff6012acd216cfed
92 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a movie title and the malicious URL, suggesting a lure to entice users to click the link. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=bhagavathi+tamil+movie+hd
    • http://files.2dmuseum.com/uploads/1/3/1/0/131070051/lojoxu.pdf
    • http://nipiguk.labeldogshippingsupplies.com/uploads/1/3/1/3/131398591/nojedomimedajija.pdf
    • https://cdn.shopify.com/s/files/1/0437/9282/6517/files/dogawovufamixenixevope.pdf
    • https://cdn.shopify.com/s/files/1/0434/9709/5333/files/79399273744.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/jobaxamit.pdf
    • https://cdn.shopify.com/s/files/1/0433/2565/3160/files/adjetivos_y_pronombres_posesivos_en_espaol_ejercicios.pdf
    • https://cdn.shopify.com/s/files/1/0435/2724/1879/files/watermark_apple.pdf
    • https://cdn.shopify.com/s/files/1/0432/4727/2098/files/9323407181.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/simevenalunixesasosorapaw.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_off000061bc.bin
79f195573f9d389f253a97bc59c2f5d990ca4e87b0521446f7e6331a6dd068b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61BC 5072 bytes
font_01_sfnt_off000072e5.bin
f9a863d411af32fc7e7643bf6d55cf8e87d1c948179fe861360177f5d993b7aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E5 10492 bytes

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