Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8a72ed0dca2093…

MALICIOUS

PDF

42.5 KB Created: 2020-08-05 23:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49f98a0b643013ac6fd073881fd6e8a4 SHA-1: 0f9ca33dec751354da8e5cb540b626568f0aff49 SHA-256: 0e8a72ed0dca2093d6896f055b8c233d48494d1c82f8585925ab2f9e41484716
174 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. The document body, though heavily obfuscated, contains references to 'aloe vera gel forever living pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to SEO-optimized content. The presence of numerous external links, including one identified as a malicious redirector, indicates an attempt to direct users to harmful websites.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=aloe+vera+gel+forever+living+pdf
    • http://files.gloryb2g.com/uploads/1/3/0/7/130739802/7415243.pdf
    • http://files.armidaarts.com/uploads/1/3/0/7/130776032/160b3841a7097d4.pdf
    • http://files.thinkhairsalonstudio.com/uploads/1/3/1/3/131398231/994601.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/8879429783.pdf
    • https://cdn.shopify.com/s/files/1/0432/4101/3412/files/fefavedokasobidopuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/0839/3369/files/siverinexewudis.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/87074656223.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/lasinodufewivonuzimomeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/4504/3876/files/tonajuralosapidi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/39128088884.pdf
    • https://cdn.shopify.com/s/files/1/0434/4132/4184/files/nortel_networks_phone_manual_t7316e.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/midebuguxoxivukugofaxuwos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kawovuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49893706483.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wesani.pdf
    • https://cdn.shopify.com/s/files/1/0433/8024/4643/files/65372996503.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/borekogumegajagaguzojalo.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_off000066af.bin
0dc1597a084e30895b694f2a01ebcc61ed6b273da849b7d31543029e6bdbb6c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AF 5080 bytes
font_01_sfnt_off00007815.bin
4cf3ae1963776b22689029eed7d8b37082285e50742b850237ffbdf7bc290d09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7815 11380 bytes

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