Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d94851c5d25fd86…

MALICIOUS

PDF

33.2 KB Created: 2020-08-19 14:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea30aaf13ff578122102975cb8de93d7 SHA-1: dbe3dadb69950eed0fd13eb854f060376f2cc84f SHA-256: 0d94851c5d25fd868118c15dd16673a77618129a6d9f2ad92c6ce6e279ec965a
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for phishing and malware distribution. The document body, though obfuscated, contains text related to 'free tec- it barcode studio' and a URL that appears to be part of a link farm, suggesting a lure to a malicious 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=free++tec-+it+barcode+studio
    • http://files.editiononegallery.com/uploads/1/3/2/7/132741029/e6e467d0fb7.pdf
    • http://files.nestoncc.com/uploads/1/3/1/8/131871621/nazadekuxikolewovama.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2582/3904/files/enterprise_security_risk_management.pdf
    • https://cdn.shopify.com/s/files/1/0428/7650/2175/files/34566867647.pdf
    • https://cdn.shopify.com/s/files/1/0432/1633/9111/files/53964525235.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7193/files/wamopaporowiluzo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/nodipetalelalazaw.pdf
    • https://cdn.shopify.com/s/files/1/0450/2500/1630/files/taxinosoxonurixafid.pdf
    • https://cdn.shopify.com/s/files/1/0433/9164/7894/files/rexaxevubezevitexabup.pdf
    • https://cdn.shopify.com/s/files/1/0436/1139/0115/files/82671857934.pdf
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/bafajotejeragafifim.pdf
    • https://cdn.shopify.com/s/files/1/0428/4973/0727/files/wajanidegasadadimepel.pdf
    • https://cdn.shopify.com/s/files/1/0434/5085/9670/files/wordly_wise_3000_book_7_lesson_16.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_off00004558.bin
851ddf4b1681eadac75d929be151802fb0e2dea7f2564b49fad0640bd26f357b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4558 5028 bytes
font_01_sfnt_off00005679.bin
174e927df3731a7b356a6af9a798708d855987cea6e4dbc5a7cde7c83b1c99f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5679 9960 bytes