Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7c21e51c895596…

MALICIOUS

PDF

41.9 KB Created: 2020-08-11 21:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f0a4c3de706c6436e6ac449c96a0629 SHA-1: b7a8ab3488d7ba3da996510b97632cdff1ccc61e SHA-256: fd7c21e51c895596ab0d9c36b9c3309984155fd98493e035f9a319cc9c339c78
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate PDF downloads, but the primary link redirects to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms that the initial URL leads to known malicious redirector infrastructure. The document body, though heavily corrupted, contains the text 'Introduction to python programming pdf download' and the malicious URL, suggesting a lure for users seeking educational materials.

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=introduction+to+python+programming+pdf+download
    • http://files.gavanw.com/uploads/1/3/0/8/130874213/a716ca8.pdf
    • http://files.wmacollaborative.org/uploads/1/3/2/6/132682119/wifat_doronaderod_telakujukipas.pdf
    • http://bawebepu.millworksart.com/uploads/1/3/1/4/131407241/zufuxexuxa-rowoxim-katijibifozusam-libafaridi.pdf
    • http://files.littletreasuresecc.com/uploads/1/3/1/4/131406234/nuzijeseduvusakaxev.pdf
    • https://cdn.shopify.com/s/files/1/0437/5019/5354/files/35655875524.pdf
    • https://cdn.shopify.com/s/files/1/0435/6741/5457/files/shl_verbal_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/3617/1688/files/mercado_livre_energia.pdf
    • https://cdn.shopify.com/s/files/1/0439/4457/5131/files/informe_de_destilacion_por_arrastre_de_vapor.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/soul_enchanter_maplestory.pdf
    • https://cdn.shopify.com/s/files/1/0430/7232/3737/files/understanding_comics_chapter_5.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/boxiredigogusu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/59930433031.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/kopigetigoxanagajipolo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/78947103202.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_off00006411.bin
87b1d28796287fa3f0508e2e1e77a8a470fb50a9ac88ea1941d98ee1a5e5a9a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6411 5524 bytes
font_01_sfnt_off000076c6.bin
093af088199d37c148c46e3242c97a765cd55442017f17ef382221aa5d62cf6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C6 10516 bytes

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