Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a77fc13d64791f9…

MALICIOUS

PDF

52.0 KB Created: 2020-08-19 05:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a007a2c762a19d6e39a04790414c31dc SHA-1: 280a1a2cb1f2b5ab7400b3a59a0328e0421f17f5 SHA-256: 1a77fc13d64791f921280df73cefe0606327b5df9a9330c6b374401c3aa437da
150 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL 'https://ttraff.com/pify?keyword=audio+link+up'. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, with 'https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewubi.pdf' being the first in this farm. The ML classifier also strongly indicated maliciousness. These factors suggest the document is designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=audio+link+up
    • http://nunel.kldsoccer.com/uploads/1/3/1/1/131163960/bovufexo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewubi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6575/files/music_sheet_reading_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/libov.pdf
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/57809736810.pdf
    • https://cdn.shopify.com/s/files/1/0436/0513/1421/files/weedeater_carb_adjustment.pdf
    • https://cdn.shopify.com/s/files/1/0432/6588/4323/files/dijebibadufax.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/magejuxasokexuninoze.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/17701916506.pdf
    • https://cdn.shopify.com/s/files/1/0434/6350/8121/files/xupopulalenoborobuba.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0997/files/94635388445.pdf
    • https://cdn.shopify.com/s/files/1/0432/0421/4942/files/sentencing_guidelines_traffic_offences.pdf
    • https://cdn.shopify.com/s/files/1/0430/9552/3485/files/mudotofun.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/nupizimutabikam.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_off000087a1.bin
a4cb37374be0ef60914caf707931203b8c977fcf4960585a8f41dd9e66b668d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A1 4524 bytes
font_01_sfnt_off00009711.bin
e042646956db8b82955b12c99d9b0b0d21b0b6e3031f1d2f59e39a292ac6f97a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9711 13992 bytes

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