Malicious PDF — malware analysis report

Static analysis result for SHA-256 498350e634f7a7b8…

MALICIOUS

PDF

42.2 KB Created: 2020-08-09 03:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc0b05b17cd291496fadb7c2f09aa4bb SHA-1: ae0eff28287442225a07dc1d2bd3c8980e918329 SHA-256: 498350e634f7a7b8ca4d2b0ae7a80ed0d5071c5aa591a92c601fadb9f9c5f3f1
152 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 a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF files, suggesting a coordinated effort to distribute malicious content or phish users.

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=geometry+definition+worksheet+pdf
    • http://files.xogingy.com/uploads/1/3/0/7/130739379/tavixaferunux_fakujimiwi.pdf
    • http://files.thetlacademy.shop/uploads/1/3/1/3/131384789/dupive-madelubupazape-dezarekinoza.pdf
    • http://sanal.stjohnslutheranchurchjenison.org/uploads/1/3/2/7/132712207/gupurak_jakojijarod.pdf
    • http://xagaju.plainlanguageacademy.com/uploads/1/3/1/4/131406202/xemazurog.pdf
    • http://relabo.mdmaternityaccess.org/uploads/1/3/2/6/132681026/pazariziratib.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/autocad_mcq_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/x26_bus_timetable.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9871/files/potezam.pdf
    • https://cdn.shopify.com/s/files/1/0435/2131/0880/files/entrepreneurial_development_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/31340181651.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jikoleluvotejagumali.pdf
    • https://cdn.shopify.com/s/files/1/0433/5350/5946/files/tijupidozedojazevipus.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/4850852142.pdf
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/nsfw_discord_rooms.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8364/files/aaron_smith_dancin.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/xawamuwebax.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8593/files/causerie_scurit.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2115/files/tratamiento_rinitis_alergica.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_off000065dc.bin
4fdeb0b0bf8e92edabeb20fe3ea84bab1aa6983301b038e167324d96857141a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65DC 5328 bytes
font_01_sfnt_off000077f9.bin
9ab59446ff947b0c9f646d62090109e62a6e15dba5d84080264dfba9d7ebca07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F9 10504 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.