Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b582fa47fee573…

MALICIOUS

PDF

46.4 KB Created: 2020-08-30 11:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 229b3e0828c8927e0e9c1a644a960f0e SHA-1: d2bf50843b40b7567965c5d3699dcc15824995ff SHA-256: 28b582fa47fee573f2710a72c8271cf566472143d10f1a2a07061ae2b94a618f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to product searches. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms the malicious nature of the embedded URL.

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/wix?keyword=soundsport+in-+ear+headphones+apple+devices
    • https://cdn.shopify.com/s/files/1/0435/5201/4495/files/what_is_working_capital_management.pdf
    • https://cdn.shopify.com/s/files/1/0433/6769/4490/files/14631976073.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdf
    • https://cdn.shopify.com/s/files/1/0440/6837/2632/files/kauri_coast_guided_night_forest_walk.pdf
    • https://cdn.shopify.com/s/files/1/0439/2806/0059/files/tales_of_vesperia_giganto.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6375/files/tebeketozoda.pdf
    • https://static.usrfiles.com/ugd/3aee12_551d00b61e6a46fdab71f08e9a2f67d0.pdf
    • https://static.usrfiles.com/ugd/fbccce_d7808136968740be9553c7ba172ffa6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0a1acd69a744bdc87d22a4cbe0bff06.pdf
    • https://static.usrfiles.com/ugd/97493d_f835c87c6c984cb6ac7f1d9d22de5298.pdf
    • https://static.usrfiles.com/ugd/16a96a_ef81e1cc95da42bd9781793704ba00aa.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_off00007727.bin
f2c7f2fae361c03e75092b5c572b30de24c3b36bc8d7857802f1230cbea95738		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7727 5356 bytes
font_01_sfnt_off0000895a.bin
36542aa3a72a8e4eb0dd4f64845cc2039717498a3e5156093f8d243d00915c9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x895A 10364 bytes

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