Malicious PDF — malware analysis report

Static analysis result for SHA-256 00569b6c2ab58c11…

MALICIOUS

PDF

40.6 KB Created: 2020-08-09 08:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8df1a3526fba4ced241f98318f6d468e SHA-1: 9a86b0bc3c6c8aca01f880c6e925f1f8f918218d SHA-256: 00569b6c2ab58c11bf4276c65adc99086885992948db0464230e4824647d7d6f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one critical heuristic identifying a redirector link to 'ttraff.cc'. Another heuristic indicates a link farm, with many links pointing to Shopify domains, some of which are confirmed benign, but others are unknown. The ML classifier strongly suggests maliciousness. The document body is heavily obfuscated and appears to contain the same redirector URL, suggesting a lure to external 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.cc/pify?keyword=business+writing+definition+pdf
    • http://files.yardieting.com/uploads/1/3/2/6/132682303/guxeretukewegun.pdf
    • http://xawewinu.leatherneckclassic.com/uploads/1/3/0/7/130775320/kedisuvatotujivi.pdf
    • http://files.christineblanchet.co.uk/uploads/1/3/0/7/130739214/sixolajiror_nebelumagepa_famoxilevolaso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/paypal_classic_desktop_site.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28821374719.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62114329075.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0850/files/embroidery_designs_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5499/6383/files/bob_marley_biography_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2101/files/31511726069.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/kobepozo.pdf
    • https://cdn.shopify.com/s/files/1/0448/0519/3885/files/boy_baby_names_hindu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7785/files/pokemon_red_gameboy_advance.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9575/files/probability_density_function_exponential.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_off00006137.bin
011561ddacc3aeee568619e3c2310d3c401ecb62ae9794f6d98355e00ebc2ef5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6137 5108 bytes
font_01_sfnt_off000072c5.bin
1e4a21f14079f4f79adcea7754fa0d2434d8767ee0f9b8ed2f2c775e92cff8dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x72C5 10180 bytes