Malicious PDF — malware analysis report

Static analysis result for SHA-256 630652db9c9a33df…

MALICIOUS

PDF

48.5 KB Created: 2020-08-20 09:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ded913026a96b5308f7098ac59c58ab1 SHA-1: cdb6483182fe8b1f641e54a2d56f5a002caced73 SHA-256: 630652db9c9a33df50a87522a89bd2db543b019637eaf3740af28d7f4b6a06ba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=mediums+book+allan+kardec+pdf', is embedded within the document body and is likely intended to lure the user into downloading a malicious file or visiting a phishing site. The ML classifier also strongly indicated maliciousness.

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=mediums+book+allan+kardec+pdf
    • http://files.tiffanyshocklee.com/uploads/1/3/1/4/131438682/labaza.pdf
    • http://virewiwew.secondstoryhoney.com/uploads/1/3/1/0/131070894/bb3aa89b1b1acd.pdf
    • http://files.harvestonthereservoir.org/uploads/1/3/0/8/130873876/jexiverif-zuduzevofevos-zosegasusefot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/81862150850.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8206/files/biophysical_chemistry_cantor_schimmel.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/juvifezog.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/mudabavosizojakexi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1684/5469/files/wajizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/ma_cuisine_algrienne.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84005007378.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/cations_and_anions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/0427/8422/files/75727182358.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/medium_clue_scroll_maps.pdf
    • https://cdn.shopify.com/s/files/1/0431/1305/4359/files/lupe_fiasco_the_show_goes_on.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mokotutirajozejimus.pdf
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/424980089.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f6d.bin
19ce0240b39e586413a639cddb4ea70bb1c028252ca324c802b1ebc45f05eb39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6D 5508 bytes
font_01_sfnt_off0000920c.bin
475e80e82828cb7ed4b0574fec613d4e27244d33848b786fa82fed20f6623454		 pdf-font-stream PDF embedded font (sfnt) at offset 0x920C 10216 bytes

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