Malicious PDF — malware analysis report

Static analysis result for SHA-256 132102634d2aa562…

MALICIOUS

PDF

44.1 KB Created: 2020-08-29 10:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 383b8960fad1008174125cbfb1c36aa4 SHA-1: 28dfafef6f5ab1434c25ebd0d1406b076179038b SHA-256: 132102634d2aa5628c51a8bbee8624047fa131330e4260ccc66ca8fddbe1c04c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL suggests an attempt to lead the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attempt.

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/wix?keyword=panda+planner+focus+examples
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_735c6288f6dc435e9ebd8326560b260d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c92483f654da4abebf15557d295bfa6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_bcd8973795be41eb839cd04e31656ea2.pdf
    • https://static.usrfiles.com/ugd/b8c837_2977d4f4b08f41228e7cb93640987667.pdf
    • https://static.usrfiles.com/ugd/b8c837_67869d0b1a424653b7b6877be0e9f2df.pdf
    • https://cdn.shopify.com/s/files/1/0428/3485/4051/files/sezumaderiwanuso.pdf
    • https://cdn.shopify.com/s/files/1/0464/8078/5576/files/amana_dryer_ned7200tw_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0453/6195/4971/files/dedebejazadowetama.pdf
    • https://cdn.shopify.com/s/files/1/0432/5860/9819/files/zorasexunupavixi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3110/1603/files/10665277021.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b3ccff3355c4b72882e361250503326.pdf
    • https://static.usrfiles.com/ugd/b8c837_e41db60785a940b79d36a42069d4c010.pdf
    • https://static.usrfiles.com/ugd/b8c837_8dc00927f9bc495dbb3696621fa70c90.pdf
    • https://cdn.shopify.com/s/files/1/0433/5324/3816/files/maplestory_v62_training_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/wigugiwotokeve.pdf
    • https://cdn.shopify.com/s/files/1/0462/7746/0128/files/spongebob_coloring_pages_gary.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_off00006f01.bin
62416b8ed6e671eed68722d4f296e7a62a4017d038d589fba281d31c6697e3ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F01 5372 bytes
font_01_sfnt_off00008132.bin
c46a68f709ec6a1787ded8dc78d78393aeb479ddfc0ef74d75a2f5de3bb38ecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8132 10084 bytes

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