Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e2567f1a880170…

MALICIOUS

PDF

42.0 KB Created: 2020-08-20 02:39:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a150432af6c9c5fdff3c2d4a7f84772c SHA-1: f5b05667af23e71031780738cf67d0064d39a0fb SHA-256: 95e2567f1a880170867f86addb58efcdbff30c7081079b8e7e28eeb786702c93
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. One prominent URL, 'https://ttraff.cc/pify?keyword=offline+grammar+checker+app+for+android', is identified as a malicious redirector. This suggests the document's primary purpose is to drive traffic to malicious sites, likely for further exploitation or phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=offline+grammar+checker+app+for+android
    • http://nazipero.150spear.com/uploads/1/3/2/6/132682533/dikakematitan-bisilixe-kewakem.pdf
    • http://files.smosparish.com/uploads/1/3/1/4/131438848/sileluzabimas.pdf
    • http://japisivig.vibrows.ca/uploads/1/3/0/9/130969306/1050441.pdf
    • http://files.milleratcree.org/uploads/1/3/1/4/131454916/291ff4f35050db.pdf
    • http://jimapud.jakesmoviestuff.com/uploads/1/3/2/8/132815986/ditoj.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/valufupiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/spring_framework_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6073/files/tizazomivilebu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6435/1130/files/34707606382.pdf
    • https://cdn.shopify.com/s/files/1/0433/8355/4202/files/69567799328.pdf
    • https://cdn.shopify.com/s/files/1/0450/2441/1806/files/auditory_brainstem_response_interpretation.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/jawoxozosev.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/fogomurigibozu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/jugonusavukalexowawup.pdf
    • https://cdn.shopify.com/s/files/1/0434/7926/9541/files/55977912053.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_off00006724.bin
191f8cd6e2920069a0d15d91df22eb7318bf7a36f8630014c0262b8717b93119		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6724 5480 bytes
font_01_sfnt_off00007993.bin
823bfc1365946d3b05c4a82c248011419eb649acc2d4d222901178a716c710ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7993 9808 bytes

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