Malicious PDF — malware analysis report

Static analysis result for SHA-256 10263f877a02c2ad…

MALICIOUS

PDF

39.7 KB Created: 2020-08-31 01:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2b97515b4b1ba746027b912b3b0abc5 SHA-1: 79cf624c1f31c97fb5dc15ae64679dc5a5f5f863 SHA-256: 10263f877a02c2ad83361829f38cdfb57d27b80f3f838b5b7d282ea356ca9a14
154 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure to download content, likely leading to malware. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are to benign-looking PDFs, likely for SEO manipulation to improve the ranking of the malicious redirector.

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/wix?keyword=pinkprint+album+download+zip
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3dd68e_c04a15a7f5434a09a74b266f6e35e338.pdf
    • https://static.usrfiles.com/ugd/d54300_fc5d6fc3072d49649daf03d72055b30e.pdf
    • https://static.usrfiles.com/ugd/b65acf_31e8916063704a7298051e5cbdc511f4.pdf
    • https://static.usrfiles.com/ugd/05301a_56de12f6004b4ca99a65d82a195326d3.pdf
    • https://static.usrfiles.com/ugd/5b9a87_35cdf5d8ddb244aab4872cb6b35ffef1.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b1d0a83b5f24a71985914db063d5bbf.pdf
    • https://static.usrfiles.com/ugd/f63f29_ed0aab936f1e4336b2bdb82ab4f305cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_d63e9179ec9c4057915a8716084d9ae0.pdf
    • https://static.usrfiles.com/ugd/b8c837_685c5de96c4c4fb7b9e312da8da0a627.pdf
    • https://static.usrfiles.com/ugd/89c6ad_99cbcf5d80024142aeed440ca1f081a7.pdf
    • https://static.usrfiles.com/ugd/67e251_75822c0024454e308d3776584c0781f2.pdf
    • https://static.usrfiles.com/ugd/cc14e4_405fc8c787a84a98997a4f715108b98b.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_off00005cc9.bin
c6eb71ab9276c4ab0cd4fe10da352fdf255f131eef328109bf17aab73f4d2509
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC9 5276 bytes
font_01_sfnt_off00006eab.bin
9b1c610d8b30151834f2dc4988f6f6eae59fe84e49df3de804f7efe069f139c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAB 10420 bytes