Malicious PDF — malware analysis report

Static analysis result for SHA-256 0535a39ff9db2250…

MALICIOUS

PDF

42.1 KB Created: 2020-08-06 02:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c233323b91313d492180c2ae79dcb191 SHA-1: 457805c1833ef056d4381e41a5d955d835f83e80 SHA-256: 0535a39ff9db22505b48af4fbe0c905fd59a2b73e725807763d7beec2141ab3b
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 designed to manipulate search engine results. One of the primary links directs users to 'ttraff.com', a known malicious redirector. The document body, though partially corrupted, contains the URL 'https://ttraff.com/pify?keyword=materi+aritmatika+sosial+smp+pdf', reinforcing the malicious intent of redirecting users to potentially harmful content.

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=materi+aritmatika+sosial+smp+pdf
    • http://files.peterandmichele.com/uploads/1/3/1/4/131408942/fudad.pdf
    • http://files.summitlakecommunity.org/uploads/1/3/1/4/131438114/zuteje-segadutizafi-sububo.pdf
    • http://files.proorganizerlindsay.com/uploads/1/3/0/8/130874328/4020664.pdf
    • http://files.cometsbaton.com/uploads/1/3/2/6/132681164/xifuvonaretamodegaja.pdf
    • http://files.dreamsupercars.net/uploads/1/3/0/9/130969340/df063e9fd89d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/69171842817.pdf
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/hotel_standard_operating_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/86699176957.pdf
    • https://cdn.shopify.com/s/files/1/0434/7029/1096/files/47597541262.pdf
    • https://cdn.shopify.com/s/files/1/0435/8501/1869/files/4825551936.pdf
    • https://cdn.shopify.com/s/files/1/0439/6577/6030/files/banatop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0989/1742/files/mugasibet.pdf
    • https://cdn.shopify.com/s/files/1/0432/7935/1976/files/pelixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/jukububokem.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/dewofeloluwopoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/2755/2661/files/22192263966.pdf
    • https://cdn.shopify.com/s/files/1/0440/4215/8245/files/siwuxobotilufuluvodevari.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_off00006677.bin
207bb818ab0718967f3623bd442c46ac53056e1182ba7b82f761a8046efabee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6677 5256 bytes
font_01_sfnt_off0000784f.bin
703d47b192f2affcc98294a3ca40306d0bdfea6f06bbcd7a53714d5f6594bc8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784F 10248 bytes

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