Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a3e6e1d076070f…

MALICIOUS

PDF

40.6 KB Created: 2020-08-27 15:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9242779248bd0a6855afeae49a09a4fe SHA-1: d9274175514394b6e81438409b693ca581c48c95 SHA-256: 16a3e6e1d076070fb3310529019ea17f48318fcec294e850a0ad9e9692b27368
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though obfuscated, contains text related to a 'Verizon jetpack mifi 6620l external antenna kit' and includes numerous links to external PDFs, many hosted on Shopify, indicating a link farm designed to potentially distribute malicious content or engage in SEO manipulation. The presence of embedded URLs and the ML classifier's high confidence score further support the malicious nature of this document.

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=verizon+jetpack+mifi+6620l+external+antenna+kit
    • http://files.jrasales.com/uploads/1/3/2/6/132695732/kubulobopew-soruwewulitumo-pofebos-nijadusarenar.pdf
    • http://pavelibag.mrwhatley.com/uploads/1/3/1/0/131070197/22b20ddb207f16.pdf
    • http://pajefo.nowwwriters.ca/uploads/1/3/0/7/130739278/lofovoraza.pdf
    • http://tujukuzof.eurekasally.com/uploads/1/3/0/8/130814328/bc42913285bc8.pdf
    • http://files.21socialstudies.com/uploads/1/3/1/0/131070394/6b834ca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0873/5907/files/calcul_bobinage_transformateur.pdf
    • https://cdn.shopify.com/s/files/1/0431/8494/7357/files/83698422436.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/labati.pdf
    • https://cdn.shopify.com/s/files/1/0445/5032/4388/files/student_attendance_system.pdf
    • https://cdn.shopify.com/s/files/1/0430/0596/8537/files/dagugexuter.pdf
    • https://cdn.shopify.com/s/files/1/0430/9028/0609/files/2742162739.pdf
    • https://cdn.shopify.com/s/files/1/0435/7046/2883/files/guilloche_pattern_generator_software.pdf
    • https://cdn.shopify.com/s/files/1/0430/2022/2627/files/7783743184.pdf
    • https://cdn.shopify.com/s/files/1/0449/2325/6999/files/37000705033.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/47684591322.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/25978881176.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_off00005fd3.bin
fb73079dda13d1d1199efc4559e9acd2a32434848a0efbb2ed699dcddccbb1a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD3 5636 bytes
font_01_sfnt_off00007302.bin
925ed357e9619b4260820e8ce13574c2282dbcf04be266f8232332819173b98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7302 10012 bytes

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