Malicious PDF — malware analysis report

Static analysis result for SHA-256 da773d3565a544a0…

MALICIOUS

PDF

53.6 KB Created: 2020-09-16 18:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 110ec7d3a1498cdf4233799bc89814c2 SHA-1: 61ebdfbe9590ef7ee72c30eda8364f5ff9c61abb SHA-256: da773d3565a544a073f3dfb42985eeb90e44e3d84760d906b6dede6c25e2fcbe
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the one identified by the redirector heuristic. This suggests the document's primary purpose is to lure users to malicious sites, likely for phishing or malware distribution.

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.club/wix?keyword=what+does+half+ou+mean+in+time
    • http://vuxek.fldwid.org/uploads/1/3/1/8/131856190/kiwidozugufifop_mopuwepavemamuz.pdf
    • http://files.ceylonboutiquehotels.com/uploads/1/3/2/6/132681342/xizefigano.pdf
    • http://dinofew.leandromorgado.com/uploads/1/3/1/4/131454012/dukivut_rabaxamorup_wewaroxowutiwa_rarir.pdf
    • https://6f86f782-d66a-42f2-886f-231f6b17cc2e.filesusr.com/ugd/3f1130_154ea4523e464dd4a8396810b5e30652.pdf?index=true
    • https://cf625123-db2e-4e34-9541-701683b6dbb4.filesusr.com/ugd/b42fd6_9dfd53c295b74723a2e0aad6b25bc92d.pdf?index=true
    • https://b9677065-f33b-46a2-969e-588a4eec311f.filesusr.com/ugd/bfbc46_9b85822b1d204c76a84369c66c161abe.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/7899/1513/files/alfa_laval_purifier_overhaul.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1713/files/33761275007.pdf
    • https://cdn.shopify.com/s/files/1/0432/8292/3676/files/fanuc_programming_manual.pdf
    • https://b371eb4b-5f51-4e4a-be79-89b896354690.filesusr.com/ugd/145364_3342c36e248a4f4fa087accd834e7adc.pdf?index=true
    • https://e155f019-9a06-4e62-9ed1-85d9d25cabb2.filesusr.com/ugd/edb4a7_baa52a537e8d400caf0e7e23de719c20.pdf?index=true
    • https://bb59df2e-4e77-4846-9877-aafd51eca8dd.filesusr.com/ugd/17ce20_22b000c86d704dfda388be637a23625f.pdf?index=true
    • https://6035dc3b-d41d-4bed-8e8e-de3a4299c2d3.filesusr.com/ugd/b1b3ad_0d614495547c40b78f049540e71bb29a.pdf?index=true
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006905.bin
f1c610477a08e107fcb988627e92f544102d7269096d6c41286a19f1c448e3a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6905 5064 bytes
font_01_sfnt_off00007a20.bin
d77492be9502ac0cdf32732f77870b25d3400c0ebfda0fa5523bfcdb0216ec9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A20 4644 bytes
font_02_sfnt_off00008b12.bin
ca19fe69be58b7b0aca7ab327ab6073ab8d921237a8d9ac1db52bf6f27f7d143		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B12 10800 bytes
font_03_sfnt_off0000b02c.bin
0f888ff7ffbdeb2ae3ed3eae14ffc5cd0a6525c288566839254d22fd2d3eac05		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB02C 16784 bytes

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