Malicious PDF — malware analysis report

Static analysis result for SHA-256 4429dca06f8323e2…

MALICIOUS

PDF

42.9 KB Created: 2020-08-07 05:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f938027f1e1919b234e5bad832623764 SHA-1: 53d73867115087c170fa198300384b10c431b402 SHA-256: 4429dca06f8323e241ad8be83f58916ff563ea5f3931dcf377963d02c5ad9d4d
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at https://ttraff.com/pify?keyword=challenger+annuity+rates+pdf. This suggests the document is designed to lure users to malicious infrastructure under the guise of providing annuity rate information. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=challenger+annuity+rates+pdf
    • http://files.afterthefallinc.com/uploads/1/3/0/8/130874213/burifikivaberu.pdf
    • http://files.gymnasion.net/uploads/1/3/0/8/130874382/mogilugabobulomolow.pdf
    • http://xitaziv.melco-audio-masters.com/uploads/1/3/0/8/130814238/6663350.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/92356328490.pdf
    • https://cdn.shopify.com/s/files/1/0433/0133/9304/files/60055852742.pdf
    • https://cdn.shopify.com/s/files/1/0434/2182/7222/files/afloat_shopping_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/sodosel.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/pevolafasanasezefapatem.pdf
    • https://cdn.shopify.com/s/files/1/0432/3367/3380/files/5256952729.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/tapakinakobuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/kuruzapomipofabux.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/37449543553.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/segedini.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/xozidirixogesapenume.pdf
    • https://cdn.shopify.com/s/files/1/0431/4805/0586/files/wufogalugoba.pdf
    • https://cdn.shopify.com/s/files/1/0430/1383/2857/files/61357731000.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_off00006a2f.bin
cacae1b1a1c126415705e6dc1594b9403e4f6bedd7906769f3c3f633bbaa3b55
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2F 5308 bytes
font_01_sfnt_off00007c3f.bin
c9ffd0b0fbf82f05a04e711ea49a6672c7c464af342136d3dee4093afde2a84c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3F 10132 bytes