Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c84f5394d2b517…

MALICIOUS

PDF

46.2 KB Created: 2020-08-22 17:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89556182b97dfd04c32df03a73338ba8 SHA-1: 988e804a92cdcefa6242b0f99f4563f4e0fae412 SHA-256: 67c84f5394d2b517f7109d71b15bd29a00adf74ba6aa19f96b746d4a6b48bf84
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains the malicious URL. This suggests the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the presence of embedded links and the ML classifier's high confidence indicate malicious intent.

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.ru/pify?keyword=chunkzz+full+movie+free++720p
    • http://wogepi.hedgequote.com/uploads/1/3/1/6/131606755/kisipasiv-tuzopatavelune.pdf
    • http://gepej.yogadiversityinitiative.org/uploads/1/3/1/4/131437261/laroli_pezogijavamu.pdf
    • http://files.henryrice.co.uk/uploads/1/3/0/7/130775346/mumenuti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/5761/4741/files/que_son_las_actitudes_positivas.pdf
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/86281559892.pdf
    • https://cdn.shopify.com/s/files/1/0465/1417/6150/files/drowning_hand_meme_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/writing_about_myself_sample.pdf
    • https://cdn.shopify.com/s/files/1/0433/5501/3275/files/sijoxogumutaboretule.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3866/files/orthodox_tewahedo_biblical_canon.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/85607184681.pdf
    • https://cdn.shopify.com/s/files/1/0433/3935/0181/files/47283715832.pdf
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/caverna_do_drago_requiem.pdf
    • https://cdn.shopify.com/s/files/1/0434/2307/2412/files/73567316653.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1268/files/36129912796.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_off00007453.bin
bb8fffb1034caaa6b91edca9f701c28f660619923d7d7543b3deb8a58367ae13
pdf-font-stream PDF embedded font (sfnt) at offset 0x7453 5184 bytes
font_01_sfnt_off000085e2.bin
f11e7069300728e63ec09b0d04f5c341539873b962e76de0c4898d3e1b23442e
pdf-font-stream PDF embedded font (sfnt) at offset 0x85E2 11820 bytes