Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ab2fc2f29f3906…

MALICIOUS

PDF

48.1 KB Created: 2020-08-17 10:40:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a343555d206a9baa08b9af469ee23387 SHA-1: fc4b7ce12d3bdf21b06809843926eca399a0d8b2 SHA-256: 62ab2fc2f29f3906b95fba9c38bf817522706ee1caed8f93a00d8a016a27704c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a critical redirector link pointing to ttraff.com, which is flagged as malicious. The document body, though heavily obfuscated, contains keywords related to school uniforms and the redirector URL. This suggests a phishing or scam attempt to redirect users to malicious content.

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.com/pify?keyword=aycliffe+drive+primary+school+uniform
    • http://xuzomim.eastkentleafletdistribution.co.uk/uploads/1/3/1/4/131452883/17b19ff527a4.pdf
    • http://files.dunbartonlibrary.org/uploads/1/3/1/4/131408798/302584.pdf
    • http://nogusug.astoria2000.net/uploads/1/3/1/1/131164250/2877587.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/vibukezoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6558/1468/files/wya_urban_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0437/1300/3674/files/81270637516.pdf
    • https://cdn.shopify.com/s/files/1/0428/0067/7031/files/47774751741.pdf
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/33709738849.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/100_benefits_of_speaking_in_tongues.pdf
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/les_accords_piano_jazz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0816/3993/files/82828655682.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/lavunelewokupotomulizod.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_off000073e1.bin
b6262631e8642d2323095c51e8bb3128bd03ac8aeabfae54c4dbeac8dd344774
pdf-font-stream PDF embedded font (sfnt) at offset 0x73E1 5548 bytes
font_01_sfnt_off00008696.bin
ca400249b12da3100b5b33fb54b6e3b57798b7bee84b73b5d88068cb6e1a5a07
pdf-font-stream PDF embedded font (sfnt) at offset 0x8696 14364 bytes