Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf9fae0c58d5c9a…

MALICIOUS

PDF

42.3 KB Created: 2020-08-19 06:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb8d033c7c6582c19ca76d2a070ad6ff SHA-1: ac0e186e364857295f94ddc3221474d6df14d6d3 SHA-256: 8bf9fae0c58d5c9a572b54f19f973b7bc4d0f85179c4054a6cf2f3aba30c3e84
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the text 'Marvin bagley injury report' and the malicious URL 'https://ttraff.com/pify?keyword=marvin+bagley+injury+report', suggesting a lure to a phishing or scam page. The presence of numerous Shopify links, while individually benign, contributes to the SEO spam nature of the document.

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=marvin+bagley+injury+report
    • http://nakoku.advisorthoughtleadersummit.com/uploads/1/3/1/0/131071164/1cb609dc257501d.pdf
    • http://files.guidelinefit.com/uploads/1/3/0/8/130874633/fepawagusirovo_lezazezorerurej.pdf
    • http://nijozebuj.lawsmosis.com/uploads/1/3/2/3/132303072/kisanig_fexesad_vilobosu_luwazifudarik.pdf
    • http://makiwom.spencerallanpatrick.net/uploads/1/3/0/8/130814611/2a6c9.pdf
    • http://files.rachaelhainswesson.com/uploads/1/3/2/6/132695679/pupemamelaxed.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/17851480567.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/91473250080.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68876684382.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/public_administration_act_2020_vic.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/toefl_writing_exam_format.pdf
    • https://cdn.shopify.com/s/files/1/0430/7818/9205/files/11168792894.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0728/files/85007928759.pdf
    • https://cdn.shopify.com/s/files/1/0437/5894/4405/files/gominosezurago.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/98389190325.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0296/files/mewefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7010/3452/files/antioxidantes_y_radicales_libres.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/kavox.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_off00006638.bin
f95d2d2f3ba39df97929499e5f35538871b5e077265caadbea51eb58945a8386		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6638 5192 bytes
font_01_sfnt_off0000780a.bin
e848202299887df359ce15b4155db835833fd148eed7fbd4527b9cf65eb7321f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780A 10680 bytes

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