Malicious PDF — malware analysis report

Static analysis result for SHA-256 6becdf65cd9af4ae…

MALICIOUS

PDF

160.9 KB Created: 2020-09-07 01:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c302c124957dd1527fb21878ef5b754 SHA-1: 37248494ac5bd85c063dd2b4960a9616c9e1934e SHA-256: 6becdf65cd9af4ae852111888b4a99c9588b559b8e9567e1d3545ba559413d94
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is likely intended to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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.me/pify?keyword=beowulf+old+english+audio
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/9734e7_caa233b3fdee4d579481eff9b068ed3a.pdf
    • https://static.usrfiles.com/ugd/ae15ca_db773556f86c4f939023a1e8d812924e.pdf
    • https://static.usrfiles.com/ugd/a4ea6c_257b3911f6454ff2af3c937542b2b917.pdf
    • https://static.usrfiles.com/ugd/270e53_c5726ebe22bf4e099f5782c640209ccd.pdf
    • https://static.usrfiles.com/ugd/f515ca_0d4235811d454b9792cce441a6689da2.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/calligraphy_alphabets_for_beginners_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/fozem.pdf
    • https://cdn.shopify.com/s/files/1/0437/3381/1351/files/classic_controller_to_usb_adapter.pdf
    • https://cdn.shopify.com/s/files/1/0459/6944/0928/files/27392108406.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3939/files/choose_ing_form.pdf
    • https://static.usrfiles.com/ugd/89c6ad_38aa80bb2da84b429a079e5c409c5c8d.pdf
    • https://static.usrfiles.com/ugd/113e89_a21afd5d2a2d49488a5b9af1f2b995d6.pdf
    • https://static.usrfiles.com/ugd/95089d_a1861bbb02ba4fef9c571ba17a6f1b81.pdf
    • https://static.usrfiles.com/ugd/fb41f9_268b3b3b902a4737aa93026d36d341a6.pdf
    • https://cdn.shopify.com/s/files/1/0431/8081/8581/files/textbook_of_angiology.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5144/files/kikufazefefakezerun.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000222a9.bin
50b4c9e09d8ac747de02793d36a5eb57e5f040dfdec6f7454f3c4ad2b29f87c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x222A9 5016 bytes
font_01_sfnt_off000233c7.bin
59097381484ec854d760bb19de86bded6ea0a1483286d244485d51ad3f4bbc73
pdf-font-stream PDF embedded font (sfnt) at offset 0x233C7 16924 bytes
font_02_sfnt_off000267da.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x267DA 4324 bytes