Malicious PDF — malware analysis report

Static analysis result for SHA-256 080b57c06404bd5a…

MALICIOUS

PDF

34.9 KB Created: 2020-08-11 22:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afe2ce2ba8bb007b44957d0710930309 SHA-1: 120ce03af05724634263b77d3e6acaae280dd876 SHA-256: 080b57c06404bd5a6875bf9989bea1b82e5745ce8e49aad297f786bac6b718f4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are designed to appear as downloadable PDFs, constituting a link farm for SEO manipulation. The primary embedded URL, https://ttraff.com/wb?keyword=wais%20iv%20manual%20de%20aplicacion%20y%20correccion, is flagged as a malicious redirector, indicating a likely attempt to lead users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=wais%20iv%20manual%20de%20aplicacion%20y%20correccion
    • http://files.itfcwomen.co.uk/uploads/1/3/2/6/132682570/b6487.pdf
    • http://files.oldefurrowfarm.com/uploads/1/3/1/4/131408204/godaxefapu-bekaxixilog.pdf
    • http://lozijag.flyawaykate.com/uploads/1/3/2/7/132710703/246739.pdf
    • http://farewuti.sarahssweetwaffles.com/uploads/1/3/0/8/130874104/kukobaw-xefezokoniv-lurukajejimas-jesukojekew.pdf
    • http://valonis.hopecounselingpetaluma.com/uploads/1/3/0/9/130969776/9648069.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/hallelujah_piano_sheet_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3845/files/how_to_craft_eye_of_ender.pdf
    • https://cdn.shopify.com/s/files/1/0437/9515/3058/files/32528939148.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7041/files/tilawulavejuda.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7428/files/public_finance_notes.pdf
    • https://cdn.shopify.com/s/files/1/0436/2692/2146/files/sugibinanotal.pdf
    • https://cdn.shopify.com/s/files/1/0436/7951/4777/files/takogagu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5189/2381/files/69891455127.pdf
    • https://cdn.shopify.com/s/files/1/0428/4071/9516/files/jozuzuji.pdf
    • https://cdn.shopify.com/s/files/1/0437/5235/8049/files/ulaby_fundamentals_of_applied_electromagnetics.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/84849437469.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9834/files/100_common_english_phrases_and_sentence_patterns_with_dialogue.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_off00004ab1.bin
f3a38a4abb380f0b0f47386f4c2423d3f8bf56600077c1f205aa214a9f979e9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AB1 5396 bytes
font_01_sfnt_off00005cfa.bin
090fc92227ab39fac903fbd6ec11f7dd565e5dde996c94f6d3f693bc862f1120		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFA 9848 bytes

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