Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de77e8713cc5eb0…

MALICIOUS

PDF

52.3 KB Created: 2020-08-28 23:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ab6c2e42e11c57acaafab357b092208 SHA-1: 0d312ccef3f863d819ecd739a61892d5919a8fbd SHA-256: 2de77e8713cc5eb0d07d4bf1e3e22d4633ae91831ffc6e2e3bea3a390678d76a
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.com/wix?keyword=stellaris+cheat+engine+table, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Stellaris cheat engine table' and numerous Shopify URLs, suggesting a lure to a malicious site disguised as a download. The ML classifier 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/wix?keyword=stellaris+cheat+engine+table
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/87400785677.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/valufupiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1520/0158/files/tamilgun_hd_movies_2019_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0431/6545/0391/files/tavirasewivo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/wifiwomoxepokanixafid.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/xamarin_forms_listview_binding_object.pdf
    • https://cdn.shopify.com/s/files/1/0429/6251/8182/files/94770137623.pdf
    • https://cdn.shopify.com/s/files/1/0437/4115/1386/files/55477094636.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/91361238386.pdf
    • https://cdn.shopify.com/s/files/1/0439/7573/7502/files/91508275667.pdf
    • https://cdn.shopify.com/s/files/1/0437/1428/1625/files/fimedutumapovuzo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0805/5720/files/arthritis_research_uk_knee_pain.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3120/files/nadumupevidibimiwol.pdf
    • https://cdn.shopify.com/s/files/1/0455/7180/1253/files/credit_report_meaning_in_tamil.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_off00007613.bin
e93ef8caf075a74eddc73f8908b4f7b17409494aa5013fa8481700da57468b07
pdf-font-stream PDF embedded font (sfnt) at offset 0x7613 4980 bytes
font_01_sfnt_off000086e0.bin
7d1cc091a2ff398bd1be0ffc6bee2be0625cefa06bea5aa781a137f20f9dc3ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x86E0 15336 bytes
font_02_sfnt_off0000b610.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB610 4324 bytes