Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e08229c00ae99cd…

MALICIOUS

PDF

52.2 KB Created: 2020-08-21 18:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ded39341313f0d486c62f866c8a75d5 SHA-1: 35dc7e27a28f444b8cce0331f2dcdb75f335c61e SHA-256: 0e08229c00ae99cdbdf0c350b09ccdf9f0c95c50b78837fc9015912ff80c5a38
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector infrastructure, suggesting an attempt to lead the user to a malicious site. It also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, likely for SEO manipulation or to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious.

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=isomerism+in+carbohydrates+pdf
    • http://files.lotuslifecoachingservices.com/uploads/1/3/1/6/131637570/7273168.pdf
    • http://gukivawuk.sbarcperformancehorses.com/uploads/1/3/1/4/131453046/c7c4c2351.pdf
    • http://fajoluzub.daphnematthewswriter.com/uploads/1/3/1/4/131438464/puzavi.pdf
    • http://files.tnpost289.com/uploads/1/3/1/4/131453855/gumidigotipase-giwogagigas-zagejixuwudawof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/takomigawepolilitafapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4729/6922/files/duwafoxifodon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62894204366.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2813/files/yogurt_griego_alpina_informacion_nutricional.pdf
    • https://cdn.shopify.com/s/files/1/0433/0933/4683/files/27096246803.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/hess_s_law_extra_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/4940/9950/files/tometumavidesevawavisa.pdf
    • https://cdn.shopify.com/s/files/1/0440/5339/7654/files/gosojori.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/xojetatajo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/dodojemavolovu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3916/1500/files/worejedigujebi.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_off00008e93.bin
0f135db7a0527333da098707b58572a682f0145a0bd1f9173ecbcdf3634dc260
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E93 5540 bytes
font_01_sfnt_off0000a135.bin
c52f95a2eee6e870071943b5359e69b3867b2487cbe1b592db748438d77b6564
pdf-font-stream PDF embedded font (sfnt) at offset 0xA135 10160 bytes