Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c49891ad32c8d8d…

MALICIOUS

PDF

55.6 KB Created: 2020-08-21 00:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73b0455e7f10594d2edd9142b4a84eed SHA-1: 5ebdc362c7c64476d2e6487d24674c9cac73da7a SHA-256: 8c49891ad32c8d8d5bfce71bab05a321ed88198e4e920d2525613cf7c9dfca71
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Princeton review sat manual answers' and the malicious URL. This suggests a lure to trick users into clicking the link, likely leading to further malicious content or exploitation.

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.cc/pify?keyword=princeton+review+sat+manual+answers
    • http://files.mrsbirdsmusicpage.com/uploads/1/3/0/8/130814644/mirovokirofawun.pdf
    • http://files.gamecockcop.com/uploads/1/3/0/8/130874513/sotifajama-duvidizelu-vuroju.pdf
    • http://files.joshforil91.com/uploads/1/3/1/3/131378868/6121353.pdf
    • http://files.portageresourceguide.com/uploads/1/3/1/6/131606644/8719065.pdf
    • http://sixidoxo.lisastory.org/uploads/1/3/2/6/132682347/lubutupozadodisitu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/zuses.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/calaverada_gipsy_kings.pdf
    • https://cdn.shopify.com/s/files/1/0431/4778/8450/files/libumavedatimi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0003/5490/files/16738569273.pdf
    • https://cdn.shopify.com/s/files/1/0440/8596/9046/files/past_tense_worksheets_for_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0440/3114/8197/files/cbse_nic_in_2020_class_10_sample_papers_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/all_in_one_piano_scales_chords_arpeggios.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/rupitebevom.pdf
    • https://cdn.shopify.com/s/files/1/0431/9887/3763/files/43142146054.pdf
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/alergia_por_picadura_de_insectos_tratamiento.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_off000087be.bin
bfaef68293909f94fc903afb1b01122172e6e99d13dfb7206eeceeaaab00d229		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87BE 4980 bytes
font_01_sfnt_off00009894.bin
551bb4f2f65e24fbd8671bde47232f8c5d2b7fb0aa4f0be00cc00aed2c5360e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9894 13304 bytes
font_02_sfnt_off0000c39f.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC39F 4324 bytes

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