Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f1458df3632435…

MALICIOUS

PDF

49.3 KB Created: 2020-08-28 16:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f9e51d7d9fc6553b97baaea2c28e457 SHA-1: 3fa6723ecd94f4ceb25a905712fd727e8ccacfe1 SHA-256: 06f1458df3632435e3eb97d969bad2fe26bf6cfa1f417c81be9a5d6271e6d3ee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that is likely used to redirect the user to malicious content. 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=warframe+redeemer+prime+build
    • http://files.hiagodesena.com/uploads/1/3/0/8/130873876/rareliwofiraturi.pdf
    • http://kemege.occasionaldilemma.com/uploads/1/3/1/3/131398575/688d467d39db1a.pdf
    • http://pururezin.arkansasdoghuntersassociation.com/uploads/1/3/1/3/131379117/puzusuxoledav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2229/3920/files/96968551876.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9887/files/fundamentals_of_financial_management_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/78021072356.pdf
    • https://cdn.shopify.com/s/files/1/0435/5332/5224/files/easy_to_build_birdhouses.pdf
    • https://cdn.shopify.com/s/files/1/0430/9529/4105/files/what_is_a_pci_device.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/guru99_manual_testing.pdf
    • https://cdn.shopify.com/s/files/1/0437/8034/1917/files/waltz_of_the_flowers_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3633/files/7226773480.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6408/files/cheetah_hunting_videos_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/9345/8070/files/rapekisubigixolufatukonu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7082/files/wuwetujipozowori.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/gleichungen_lsen_klasse_7_aufgaben.pdf
    • https://cdn.shopify.com/s/files/1/0438/4774/5698/files/bedsheet_painting_kaise_kare.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4885/files/8191416110.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_off0000602b.bin
df3118ec669f33b52a6317df38a52b5b5c13a43325096390126c5cf1fa22310e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x602B 5164 bytes
font_01_sfnt_off0000719c.bin
233c196d2e2061ebf024b30e40ec27da2772e21df3370bed3860e74a6fa21579		 pdf-font-stream PDF embedded font (sfnt) at offset 0x719C 2584 bytes
font_02_sfnt_off00007cee.bin
d107af56e86c6958f6015b139c0858e23926a876f10564c89cfc46fbab57a190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEE 10304 bytes
font_03_sfnt_off0000a039.bin
1c06157a628ef968540dc73e5c834ff24af397ceb3d3df7a179f114ae7a2706a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA039 16708 bytes

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