Malicious PDF — malware analysis report

Static analysis result for SHA-256 1700fd4ec235627a…

MALICIOUS

PDF

47.9 KB Created: 2020-08-30 02:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 468c608c339b5985eee2ef882edf711a SHA-1: a7d672c4d7ac28c59d97e06d49a2b938889ddb6d SHA-256: 1700fd4ec235627aa8d0f9588d3efab5cb808a6219483602442c617d9cdc836c
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.ru/wix?keyword=ruger+lc9+instruction+manual, is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain references to the URL and other benign-looking PDF links, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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.ru/wix?keyword=ruger+lc9+instruction+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/69695d_05d96cf7823b4af287cc8a19081db4aa.pdf
    • https://static.usrfiles.com/ugd/067ecb_f5253a6bf8594f909756f2e05dbc1454.pdf
    • https://static.usrfiles.com/ugd/599026_c57e0ca0e3884bfeb058951086183075.pdf
    • https://cdn.shopify.com/s/files/1/0437/1808/2711/files/konefeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/6701/5329/files/82404591532.pdf
    • https://cdn.shopify.com/s/files/1/0436/9619/3686/files/bifadozovejuduripilema.pdf
    • https://cdn.shopify.com/s/files/1/0459/9942/3647/files/disizekibexedilano.pdf
    • https://static.usrfiles.com/ugd/7baf93_886a8a6c9def472180d87f01da1020b9.pdf
    • https://static.usrfiles.com/ugd/5bb01c_5766a4f0e1e54944b8da514533ec233d.pdf
    • https://static.usrfiles.com/ugd/b77b08_b5794062466f468caeca212075c16886.pdf
    • https://static.usrfiles.com/ugd/865d50_a9a72ef119344be6b5ea2673a58d7569.pdf
    • https://static.usrfiles.com/ugd/ab0441_e67196e040e8435dbe5b783abe68626f.pdf
    • https://static.usrfiles.com/ugd/299074_908a82705cf2434eb73c65d75e89dc33.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_off000060bb.bin
86e91e2f8a66981904fa5a4383c1b1c335a8910549f1bf53e5795ef9ff27aea8
pdf-font-stream PDF embedded font (sfnt) at offset 0x60BB 5164 bytes
font_01_sfnt_off0000722f.bin
16e30f71f45fa18dafcbc825d5a6a31d3ee2d9f72d4546a8b205999f343f89fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x722F 15932 bytes
font_02_sfnt_off0000a35a.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA35A 4324 bytes