Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3d16ec7335a763…

MALICIOUS

PDF

52.5 KB Created: 2020-08-07 09:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0be4fc6aef2cf1fe7bf7593326748307 SHA-1: 01a6efe610daa7fd0b30f544dbc21f50c2a4612b SHA-256: 5e3d16ec7335a763a146ceb30bf64e9fde17ef1958d0f5722e1dbd59be688cb4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1203 Exploitation for Client Execution

This PDF document contains numerous links to external PDF files, many of which are hosted on Shopify. One of the embedded URLs, 'https://ttraff.com/pify?keyword=ccna+1+chapter+2+pdf', is identified as a malicious redirector. The document also includes a lure to copy and paste content into a command-line interface, suggesting an attempt to trick the user into executing commands that would likely download and execute a second-stage payload. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=ccna+1+chapter+2+pdf
    • http://files.whilewaitingblog.com/uploads/1/3/1/4/131406985/af1951d71f2d.pdf
    • http://files.memay-mysteries.com/uploads/1/3/1/4/131407424/967345.pdf
    • http://files.clubnahakaratedo.com/uploads/1/3/2/6/132695629/nanizomak.pdf
    • http://files.chrisandjohnholidayhomes.com/uploads/1/3/1/4/131438418/tumefopunumozibopij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/xojimo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8200/7199/files/sevafarakujuluzuman.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/sufijidudapurutukowur.pdf
    • https://cdn.shopify.com/s/files/1/0432/9511/3374/files/bawedibomujosifixaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8918/files/81369691755.pdf
    • https://cdn.shopify.com/s/files/1/0431/0486/2374/files/sativaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/61158963726.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/metovivagajibu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8319/2727/files/40524530994.pdf
    • https://cdn.shopify.com/s/files/1/0436/2004/0866/files/restart_heroku_app.pdf
    • https://cdn.shopify.com/s/files/1/0435/8632/2600/files/saxarabifaxukorulo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8404/4705/files/list_of_months.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_off0000910c.bin
d2ce0e6f008b3afdd9010b1b89ae8640e19a827597cf6193727865086afd0481		 pdf-font-stream PDF embedded font (sfnt) at offset 0x910C 5124 bytes
font_01_sfnt_off0000a27c.bin
e031a13a43e166a8d3f5db5dbced2b7014a11e5635878c63412bdeb0477997da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA27C 10184 bytes

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