Malicious PDF — malware analysis report

Static analysis result for SHA-256 60899fdba83a402a…

MALICIOUS

PDF

42.5 KB Created: 2020-08-11 08:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61ed65591bcdbda522b01712fe9c4dad SHA-1: 68901a5aff5784f7c6746bbbd3a7adce7ba314c4 SHA-256: 60899fdba83a402a14b34a1843ed41bd8877222d5d0fec6d3041cbabd5bc20fa
154 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 a link farm designed to host SEO-optimized PDF files. One of these links, 'https://ttraff.cc/pify?keyword=libro+defensa+siciliana+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, suggesting a phishing or scam attempt.

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=libro+defensa+siciliana+pdf
    • http://files.sos-socialmedia.com/uploads/1/3/0/8/130815381/17c874fb7.pdf
    • http://files.creativationevents.com/uploads/1/3/1/3/131380493/6612511.pdf
    • http://xakigemup.dmlaser.com/uploads/1/3/1/4/131483281/5318506.pdf
    • http://files.sadkaneaikidoschool.com/uploads/1/3/1/3/131379743/xibekusepuvapunaga.pdf
    • http://files.maumeebaycarvers.com/uploads/1/3/2/8/132814241/rekejujitus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8432/3741/files/kulivomivewunavobinimow.pdf
    • https://cdn.shopify.com/s/files/1/0435/7505/0395/files/wokas.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2519/files/38333297938.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/tuzojezidi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/carrie_a_estranha_livro_em.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/femisa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8299/files/48575286121.pdf
    • https://cdn.shopify.com/s/files/1/0434/4106/2040/files/dixon_ztr_mower_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8167/9523/files/20257042503.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3077/files/auditing_and_assurance_services_in_australia_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/6554/8708/files/gibinutekozoxumoluxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6279/5171/files/dovupumulas.pdf
    • https://cdn.shopify.com/s/files/1/0428/5035/3318/files/mebop.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_off00006290.bin
e882b2c701764e564a14c7ea75b7e1762c42bfb75449dd450870f7a3120e7cee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6290 5228 bytes
font_01_sfnt_off00007460.bin
28b02a898b8d37d559ea200f9c7c18eb1406e5e5f1292be41b33b8b8d0c8d41f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7460 12092 bytes

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