Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c97bdb34da7fa35…

MALICIOUS

PDF

54.1 KB Created: 2020-08-22 00:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 281ed903184beece766734cba1b1868e SHA-1: 95b891ec0085e80b38aeaec2649eab44149504cb SHA-256: 0c97bdb34da7fa351a8dea354c8ef9e41a62a5a1719ba4d584e785438927ec13
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link redirects through 'ttraff.cc', a known malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=aew+fyter+fest+bleacher+report+live
    • http://files.ecinspired.com/uploads/1/3/2/6/132681660/61552d591.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/linus_and_lucy_piano_free_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/5332/6241/files/cancer_de_mama_2020_oms.pdf
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/libros_de_tecnologia_medica.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/24565406954.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/xajulazobokugesufavata.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/tatuzifiso.pdf
    • https://cdn.shopify.com/s/files/1/0430/9096/8729/files/oblivion_imperial_corruption.pdf
    • https://cdn.shopify.com/s/files/1/0440/4166/6710/files/54836873774.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/59592429715.pdf
    • https://cdn.shopify.com/s/files/1/0431/0722/1661/files/sosuje.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/historia_infantil_sobre_alimentao_saudavel.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/ana_airlines_fleet_information.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/2587105495.pdf
    • https://cdn.shopify.com/s/files/1/0435/2504/6431/files/algebra_1_solving_inequalities_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/attachment_theory_adults.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007238.bin
06da941479e79024eb9051eba30f525f2c2e68d5c760debb0c72c284efe75875		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7238 5488 bytes
font_01_sfnt_off000084ea.bin
2d1c02d7faeb7dad5af5d103f135926a0d4fd4e69f3a7da8959d46cf8e88466d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84EA 3120 bytes
font_02_sfnt_off0000916d.bin
123d2a3144961f5c25563f951956cde1435399a97d40100f1259868e93e933be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x916D 10528 bytes
font_03_sfnt_off0000b5ac.bin
f62adf8fb5692fc5fca7aa3ff95018a63c1926e2473d8e1e5d1a911898b3fd9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5AC 16272 bytes

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