Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9c937914996e61…

MALICIOUS

PDF

58.5 KB Created: 2020-11-05 06:16:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0036f387bac013acc36c94479599862e SHA-1: 13a4c305331f5df24401691c23d66b5d24b4af92 SHA-256: aa9c937914996e6112948d5f2419fe83a916a170997f143f0c6f6bbec6c14815
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised within content related to horoscopes. This suggests a phishing or social engineering attempt to direct users to malicious infrastructure. 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.com/123?keyword=when+will+i+get+pregnant+horoscope
    • https://cdn-cms.f-static.net/uploads/4403687/normal_5f91c3f378d36.pdf
    • https://cdn-cms.f-static.net/uploads/4373522/normal_5f9198d828e27.pdf
    • https://jagamasukibo.weebly.com/uploads/1/3/4/4/134493784/degigiw_kofederogorilug.pdf
    • https://manuxemewawi.weebly.com/uploads/1/3/4/4/134443751/xojese.pdf
    • https://jigupipugefelo.weebly.com/uploads/1/3/4/3/134387822/37d15a30.pdf
    • https://kajibelewori.weebly.com/uploads/1/3/4/3/134307873/femiwe.pdf
    • https://lerelapukuvi.weebly.com/uploads/1/3/0/7/130740054/5736489.pdf
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f8b3e8e3cb2c.pdf
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/5115607.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/acb3778c-53f3-49a3-8fb4-3d2bf37a10c4/old_valley_pool_table_parts.pdf
    • https://uploads.strikinglycdn.com/files/b44a1e37-c059-48b7-9ab0-2a0f6e883d4b/favisiv.pdf
    • https://uploads.strikinglycdn.com/files/4eb92844-b7d7-4509-bfbc-dae4509dc804/41939422506.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fa8.bin
82263db2b6f2e4b8ddc52af78e100fe5ca78e48f82916acad02a0c73b64134f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA8 5300 bytes
font_01_sfnt_off000091c6.bin
8b92ec6655b5ca3de2874ab88e8c9e7765b7afaadcb7fa9f307f29cf448414c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x91C6 11496 bytes
font_02_sfnt_off0000b925.bin
1a5158b2379f9d2caa450ba28df86f2ff64bc60b76c03e4741d02eb8f7adb5b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xB925 21700 bytes