Malicious PDF — malware analysis report

Static analysis result for SHA-256 17fba038c031b4ea…

MALICIOUS

PDF

44.7 KB Created: 2020-11-01 11:41:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d27fbed85f6363e741f197fb3da7d895 SHA-1: 9a0bd24495b6e5c9d854c4324c4d6a48eb3e5881 SHA-256: 17fba038c031b4eabe09e2fbe8755704892a4846756f5a213589b4adb561b0e4
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 pointing to redirector infrastructure, indicating a link farm or SEO poisoning attempt. The primary malicious URL identified is https://ggtraff.ru/123?keyword=oasis+manual+2020, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to URLs and appears to be designed to masquerade as a manual to entice clicks.

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://ggtraff.ru/123?keyword=oasis+manual+2020
    • https://cdn-cms.f-static.net/uploads/4410448/normal_5f964f34b8061.pdf
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f870481e04c5.pdf
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f9d15f0145cf.pdf
    • https://cdn-cms.f-static.net/uploads/4378848/normal_5f93575713fbf.pdf
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/gikixurijajakovos.pdf
    • https://cdn-cms.f-static.net/uploads/4379974/normal_5f99fa6bd1e70.pdf
    • https://bazusatibewin.weebly.com/uploads/1/3/4/3/134374280/bokoluzo-jemifurivagago.pdf
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5f88ffbf62f06.pdf
    • https://cdn-cms.f-static.net/uploads/4376601/normal_5f8fb1f16d712.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/juvetaso/cold_steel_tuff_lite_blue.pdf
    • https://s3.amazonaws.com/fofeguj/45338216058.pdf
    • https://cdn.shopify.com/s/files/1/0498/2118/8251/files/madizapokopoxavijuzok.pdf
    • https://cdn.shopify.com/s/files/1/0476/9126/8262/files/moonlight_song_lyrics_ariana_grande.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_off00006f1a.bin
16a4753b37895c4b8ec9f020f90f6b2450d34c7606faae34b6aa7a7b6c4c1794
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1A 5036 bytes
font_01_sfnt_off00008026.bin
7beaa0c6ba9c40360c1453e8f009954971ef791edb46fd90737778affb21d680
pdf-font-stream PDF embedded font (sfnt) at offset 0x8026 11628 bytes