Malicious PDF — malware analysis report

Static analysis result for SHA-256 88006ebf4ea40943…

MALICIOUS

PDF

47.4 KB Created: 2020-09-07 12:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c83a25cc18d254aeda442ae1bae34d3c SHA-1: 654e5bf718ffe7bfe0789550618102d4baeb1506 SHA-256: 88006ebf4ea409435e9fd37b1cbba4ec426f1c7dbcde683bb911ac217caf4a25
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link to 'https://ttraff.link/wix?keyword=hot+microscope+apk', which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to trick the user into downloading an application. The presence of numerous other links to PDF files hosted on static.usrfiles.com and cdn.shopify.com indicates a link farm strategy, likely to improve search engine ranking and visibility for the malicious payload.

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.link/wix?keyword=hot+microscope+apk
    • http://indmu.com/softwareIf
    • https://static.usrfiles.com/ugd/b8c837_fa89c02855b941628bacb9b8834f225e.pdf
    • https://static.usrfiles.com/ugd/e73fea_86395489ec1148109c1577779aaf7c8e.pdf
    • https://static.usrfiles.com/ugd/b52961_0bd9565662944bbba13c9809c21cd552.pdf
    • https://static.usrfiles.com/ugd/724bd4_f43ccb7f082d4cdfbf550c35df569351.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3346/files/cellule_animale_et_vgtale_diffrence.pdf
    • https://static.usrfiles.com/ugd/55cc32_f1868657ef814990b34124b014d60073.pdf
    • https://static.usrfiles.com/ugd/67e251_4f7bf54c45904464ba45bc12b9f74951.pdf
    • https://cdn.shopify.com/s/files/1/0429/5013/1878/files/twitter_video_to_mp4_er.pdf
    • https://cdn.shopify.com/s/files/1/0434/5489/0149/files/letebotonir.pdf
    • https://cdn.shopify.com/s/files/1/0440/1886/0190/files/2446322571.pdf
    • https://cdn.shopify.com/s/files/1/0451/8959/5287/files/free_bypass_icloud_activation_tool.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/joliboroxetoru.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cd9.bin
f1c1f00bb77d6e6df2380b729cdaadf24a7fce87a6361c2b07ffeb5a443303fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD9 5072 bytes
font_01_sfnt_off00006e00.bin
19a66539d7f229b627467a6f218746fbda261e209655e7aee10586f01171aadd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E00 14444 bytes
font_02_sfnt_off00009b8a.bin
41e4d442c3864a700cfc85bcb65fa175d1f9c42260c796b47bfb4252cf68a2db
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B8A 16308 bytes