Malicious PDF — malware analysis report

Static analysis result for SHA-256 d472773dec0d6bf1…

MALICIOUS

PDF

46.9 KB Created: 2020-09-11 09:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0d4b2fe5ae2a8b0b0003409c04bfe9a SHA-1: a83baad2b6479678aa31a8be7d320482c0b69009 SHA-256: d472773dec0d6bf1a17d600605e5238e963fdd3f089543d5ad329ea6623f04d4
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, which is designed to lead users to malicious content. The PDF also contains a large number of external links, many of which point to domains that appear to be part of a link farm. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious redirector and link farm suggests a phishing or social engineering 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.me/pify?keyword=vlookup+in+vba+from+another+worksheet
    • http://files.gillianshippey.org/uploads/1/3/1/6/131606397/7505278.pdf
    • http://files.loganshappyrocks.com/uploads/1/3/1/4/131453588/1a462.pdf
    • http://files.nervouscurtains.com/uploads/1/3/1/1/131164236/rawapatazaretaz_ronotalovoj_zubas_rukizaxogi.pdf
    • http://mobakeb.go-teacher.com/uploads/1/3/0/7/130775027/lotubisojimusow.pdf
    • https://static.usrfiles.com/ugd/6f9b04_a61f10b661e54994949ca48b46d50c8e.pdf
    • https://static.usrfiles.com/ugd/fd7405_b85784cc2cc94e36956619efd07f05ec.pdf
    • https://static.usrfiles.com/ugd/d1c05f_ee684fd285a748998d31ce857cb6dcc2.pdf
    • https://static.usrfiles.com/ugd/8f6098_17d461395a8f41cebe5fb831ba0d648c.pdf
    • https://static.usrfiles.com/ugd/76dd3d_7c9586150043483694d0f958a61d69c7.pdf
    • https://static.usrfiles.com/ugd/585b1d_c8fe66b23aaf4baebd4c2b390071c218.pdf
    • https://static.usrfiles.com/ugd/234f58_fe36bc134c2c4998b746f10c618ea9a1.pdf
    • https://static.usrfiles.com/ugd/b6edda_4038fab8730746859ddfea6014018e07.pdf
    • https://static.usrfiles.com/ugd/145364_bc8135f54996497293d7ec62b09650e8.pdf
    • https://static.usrfiles.com/ugd/d8966e_b1812cafec8e4210bd47784c943f3fe7.pdf
    • https://static.usrfiles.com/ugd/7e6083_b55d4f944e324081a01139f2f394bb73.pdf
    • https://static.usrfiles.com/ugd/08e331_f052165e73784d22a44c281a4a676430.pdf
    • https://static.usrfiles.com/ugd/79e5df_781b08c055ad4a5393d5313cb7855ff1.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007849.bin
0c4b995abcd40ecae3460f63383e76cbb1f286054f6594d39a41fbbe2457b82b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7849 5464 bytes
font_01_sfnt_off00008acc.bin
5fe3c62b2718d2d1c2ee484a16f251fc1e07eade763282a32cbb724a1386faa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACC 10496 bytes

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