Malicious PDF — malware analysis report

Static analysis result for SHA-256 118299e40e6dda5e…

MALICIOUS

PDF

40.1 KB Created: 2020-08-11 17:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c9ce12785d004fae6e412cbdde8c873 SHA-1: 8bfa215240e13846a606562d93d76ad21ac4ff26 SHA-256: 118299e40e6dda5e6ee2c4924c1424dc0c827269f4ec17b849054d35dc69985b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. It also presents a large number of external PDF links, suggesting a link farm for SEO manipulation. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to lead users to harmful content.

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/wb?keyword=fisica%20classica%20volume%201%20pdf%20download
    • http://xawixaxop.translanguagingforebs.com/uploads/1/3/0/8/130873995/87158ec0a9.pdf
    • http://files.cunyhpcs.org/uploads/1/3/0/8/130874655/tigegeroperu-pojududexopidi-wopubiduja-rolok.pdf
    • http://files.drbrendaeabbey.com/uploads/1/3/0/7/130775701/c6c0c7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4977/7312/files/88828281604.pdf
    • https://cdn.shopify.com/s/files/1/0436/4225/7561/files/bet_on_it_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0436/0355/8564/files/rs_aggarwal_quantitative_aptitude_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdf
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/quimica_organica_concepto.pdf
    • https://cdn.shopify.com/s/files/1/0439/8986/0510/files/fender_passport_500.pdf
    • https://cdn.shopify.com/s/files/1/0430/4204/6103/files/jopifopalopenoro.pdf
    • https://cdn.shopify.com/s/files/1/0429/5963/4591/files/nosobusepepufekutuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/segapave.pdf
    • https://cdn.shopify.com/s/files/1/0428/0451/0887/files/68570469338.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2225/files/single_phase_induction_motor_speed_control_methods.pdf
    • https://cdn.shopify.com/s/files/1/0439/5125/9803/files/fusionner_2_sur_la_meme_page.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6305/files/sanyo_tv_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/78665879184.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000485a.bin
60f032f866d91fbd58f549b0ab281174cd9525766853898ef9c0f63c6d1cabde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x485A 5364 bytes
font_01_sfnt_off00005aa0.bin
1898102045f12b2c5fb1c431e716421d1279c03d6989ddabfcba93de604d0aad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA0 10684 bytes
font_02_sfnt_off00007d7d.bin
954f30c1cce2e3a00f07cb0ababb04bf86a3a3c34ed8da2fc782bdc014231390		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7D 16392 bytes

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