Malicious PDF — malware analysis report

Static analysis result for SHA-256 c20c5e525adcb7e3…

MALICIOUS

PDF

41.6 KB Created: 2020-08-22 02:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 231d4272a63493977fba636c1ec4f729 SHA-1: 572e0505907f30d09dbea5b5bf763e21c810e833 SHA-256: c20c5e525adcb7e308021ae704cea23d405a95392b2e15ab4a37f434275a682b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO poisoning or to host malicious content. One of the primary links, 'https://ttraff.cc/pify?keyword=vatican+guided+tour+official', is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that this is a malicious document designed to redirect users to harmful sites.

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.cc/pify?keyword=vatican+guided+tour+official
    • http://regobu.dsmtoolworks.com/uploads/1/3/0/8/130873995/369fc1c.pdf
    • http://mogawejit.2200firstseattle.com/uploads/1/3/2/6/132680839/kilolov.pdf
    • http://files.aucklandsuzukiviolinschool.com/uploads/1/3/1/4/131408172/d9d5ae409.pdf
    • http://files.parsonscmj.com/uploads/1/3/1/4/131452883/joziwurivafimuj_ripiwifipevel_jasoxobos_devoxom.pdf
    • http://files.loudandclearcopy.com/uploads/1/3/2/6/132695361/newebobapixelizasula.pdf
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/6347345306.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/lepexibezosatebagiri.pdf
    • https://cdn.shopify.com/s/files/1/0430/6108/4322/files/54078291633.pdf
    • https://cdn.shopify.com/s/files/1/0433/7605/0330/files/tepuzubasidawu.pdf
    • https://cdn.shopify.com/s/files/1/0465/5366/1590/files/28666497195.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/72807262519.pdf
    • https://cdn.shopify.com/s/files/1/0437/6422/0055/files/babaz.pdf
    • https://cdn.shopify.com/s/files/1/0438/6160/6550/files/24290424187.pdf
    • https://cdn.shopify.com/s/files/1/0433/2866/7816/files/whatsapp_status_sad_video_full_hd.pdf
    • https://cdn.shopify.com/s/files/1/0439/1878/6728/files/fubuduvexonaremu.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_off0000658b.bin
1c7fbc59898fa8e25f48a3b084e65f9c05dd77de748336f1e009807a67332412
pdf-font-stream PDF embedded font (sfnt) at offset 0x658B 4976 bytes
font_01_sfnt_off00007681.bin
b0cf6314614ea530a601bfd02c6fa422e6f2b50aa2633fde57da663fa9d829f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7681 10196 bytes