Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1b9234f3fc92c7…

MALICIOUS

PDF

49.2 KB Created: 2020-08-19 22:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bfec4cd5fc2777338fecf934a8fe1bd SHA-1: 4756759f42a911696204e37ae4d1685e3d746111 SHA-256: 9b1b9234f3fc92c7b2f84aa778c7172a128cd224f2a50f70f385cf2a37886f24
152 Risk Score

Malware Insights

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

The PDF contains a link farm, with many links pointing to Shopify-hosted PDFs, and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the text 'Grande prairie rcmp report' and the malicious URL, suggesting a lure to disguise malicious activity. The primary malicious URL is https://ttraff.cc/pify?keyword=grande+prairie+rcmp+report, which likely leads to further malicious content.

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=grande+prairie+rcmp+report
    • http://vorux.legallysweettreats.com/uploads/1/3/0/8/130874474/rafejegap-gitodi.pdf
    • http://files.royalstalkcrew.com/uploads/1/3/0/8/130814466/9567358.pdf
    • http://files.cougarthreads.com/uploads/1/3/1/3/131398362/zoroselilulefez.pdf
    • http://files.philipedwinpark.com/uploads/1/3/0/7/130739452/zelorufenabiwixuvubi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8807/7209/files/93724769654.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/guided_reading_lesson_plan_template_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0430/8697/1029/files/balunobabeju.pdf
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/32113253169.pdf
    • https://cdn.shopify.com/s/files/1/0433/3525/4171/files/wosal.pdf
    • https://cdn.shopify.com/s/files/1/0431/7862/3138/files/72335971731.pdf
    • https://cdn.shopify.com/s/files/1/0440/6119/6440/files/wimat.pdf
    • https://cdn.shopify.com/s/files/1/0437/6405/6225/files/waramutojevedonaxofa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5102/3526/files/pupus.pdf
    • https://cdn.shopify.com/s/files/1/0434/7602/5509/files/bopikiwitedu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/gw2_firebrand_wvw_build.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_off00008413.bin
65608edefd3ebb9b82de20fa8748542a27ba3423375eab952856cb2f0f263851
pdf-font-stream PDF embedded font (sfnt) at offset 0x8413 5040 bytes
font_01_sfnt_off00009522.bin
851b1fd62ef076cb21e001cf2bb50005acae1946610798583d1b6409c0e28cb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9522 10108 bytes