Malicious PDF — malware analysis report

Static analysis result for SHA-256 29eda42e868c1663…

MALICIOUS

PDF

76.6 KB Created: 2020-08-12 14:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7e3c773602915a89d47427592a99158 SHA-1: 31f315be8e03e4d87135fd8e9f5582083559c0ff SHA-256: 29eda42e868c16639c583c1c49341074e8eae73c9e9a8a1c2f26ab83b2a53854
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=biblia+de+estudio+thompson+pdf+en+espa%25C3%25B1ol'. The document body, though heavily obfuscated, contains text related to a 'Biblia de estudio thompson pdf en español', suggesting a lure to disguise the malicious intent. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting the user to malicious infrastructure.

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=biblia+de+estudio+thompson+pdf+en+espa%25C3%25B1ol
    • http://files.dst-transport.com/uploads/1/3/0/7/130775221/af81edb4d.pdf
    • http://sixuzara.bodyglow.co.nz/uploads/1/3/0/8/130874493/30cdafd91e.pdf
    • http://denisukuv.shooplr.com/uploads/1/3/1/3/131383314/mipobatol_pijike.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/toraladomokipina.pdf
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/ligota.pdf
    • https://cdn.shopify.com/s/files/1/0432/3278/8648/files/boveda_espiritual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8140/8420/files/sofiranukexik.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/77913515892.pdf
    • https://cdn.shopify.com/s/files/1/0438/3706/3328/files/financial_markets_and_institutions_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0439/3133/6859/files/bilangan_bulat_dan_pecahan.pdf
    • https://cdn.shopify.com/s/files/1/0433/8401/2956/files/34975226464.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdf
    • https://cdn.shopify.com/s/files/1/0434/8379/1526/files/22626759853.pdf
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/boraxepisokovusa.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/poseidon_family_tree.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b090.bin
127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB090 6744 bytes
font_01_sfnt_off0000c177.bin
4f584c1aa9525f4a4821b99f7f3855181e0ee96bacf3348dd21520ef6a8d09e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC177 5588 bytes
font_02_sfnt_off0000d400.bin
3ba3e500a0b30829319870a8b555481304b188e71bb2b6b4334752b790d86c2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD400 3288 bytes
font_03_sfnt_off0000e173.bin
bd81a9896bf7b4754e639fdff78e7cfd6cb5ce357bd7e3993b0595d480d2f8aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE173 12604 bytes
font_04_sfnt_off000109e6.bin
c7adf7d8cfe5b6312b454fcd0fd59240d00dfe62ea3e51b4c333d5f94a957324		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109E6 16772 bytes

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