Malicious PDF — malware analysis report

Static analysis result for SHA-256 5243961be11143b4…

MALICIOUS

PDF

36.7 KB Created: 2020-08-28 03:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c2f5dc0b68c54fd72d4a397bfb6537b SHA-1: 6ee3a6642a3c476d00dc20998e3c3bcaf28f7f9b SHA-256: 5243961be11143b48e091751d09e375270c1945067c91f7e954a120ec179b4f9
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, masquerading as research papers and a download button. One critical heuristic indicates a malicious redirector link to 'ttraff.cc', which is likely used to deliver a malicious payload. The document body contains obfuscated text and a reference to the malicious URL, further supporting the lure.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=adriana+lima+sextape
    • http://files.gythapress.org/uploads/1/3/1/3/131380687/juxalajiboloruzudini.pdf
    • https://cdn.shopify.com/s/files/1/0447/9470/8117/files/research_paper_on_industrial_wastewater_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/wazenifogofilimiz.pdf
    • https://cdn.shopify.com/s/files/1/0440/4497/6278/files/94743545418.pdf
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/physics_10th_class_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0435/3379/5477/files/bass_guitar_beginner_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0438/3296/7318/files/xalufuwibatas.pdf
    • https://cdn.shopify.com/s/files/1/0434/7500/9696/files/crystal_oscillator_circuit_design.pdf
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/sources_of_groundwater_contamination.pdf
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/19426809956.pdf
    • https://cdn.shopify.com/s/files/1/0435/2429/2762/files/graphing_inequalities_in_2_variables_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/8532/3683/files/ravebivo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9845/4682/files/58829954262.pdf
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/ct_pistol_permit_application.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_off0000520b.bin
41d1ef3eac56bed26f6e76f675aca53c61f7deadb3e446398f9fb50e32a3953a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x520B 5164 bytes
font_01_sfnt_off0000637a.bin
280b179cdd9ec32ec67c0285b6e7a0b933a99ef2f12feedb26e45001da65fbbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x637A 10164 bytes

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