Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef0ed605906ded3…

MALICIOUS

PDF

48.7 KB Created: 2020-08-10 14:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07bc91bc60a0475c50495ac8bbfc8267 SHA-1: 62e94c76ec1a6b100f7bc13af02b0b15413a5dbf SHA-256: 0ef0ed605906ded3384c4748f36bd763a858b072ed973c88905d611321f466d7
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious due to its extensive use of embedded links, a technique often employed for SEO spam or phishing campaigns. The primary malicious URL identified is https://ttraff.ru/pify?keyword=clasificacion+de+las+empresas+segun+su+origen+de+capital+pdf, which is linked to known malicious redirector infrastructure. The document's structure and the ML classifier's high confidence score further support its malicious nature.

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=clasificacion+de+las+empresas+segun+su+origen+de+capital+pdf
    • http://files.hammerhorses.com/uploads/1/3/2/6/132683137/vopebonugub.pdf
    • http://files.prismaticplanet.com/uploads/1/3/1/3/131379496/9220caf5e.pdf
    • http://files.rorysugruesaddlery.com/uploads/1/3/2/7/132741555/jisukoxuwuva-dusopijojebime-pebujuparap-xodiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/5724/8421/files/23803702718.pdf
    • https://cdn.shopify.com/s/files/1/0429/3532/0735/files/webimupugivelok.pdf
    • https://cdn.shopify.com/s/files/1/0436/5592/1817/files/72356199023.pdf
    • https://cdn.shopify.com/s/files/1/0438/4686/0957/files/kironirekoro.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7181/files/gimp_for_windows.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2967/files/kikotobopadixidafu.pdf
    • https://cdn.shopify.com/s/files/1/0436/8403/6761/files/12355188993.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7670/files/alimentation_saine_pour_maigrir.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3406/files/vehicle_dynamics_books.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/76420810894.pdf
    • https://cdn.shopify.com/s/files/1/0435/1341/3791/files/teguzifuziberixomu.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_off00007cf9.bin
664e003b876d0424bd5dbc788271abee7d631eca2bc839bc192a30775ea3c65a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF9 5380 bytes
font_01_sfnt_off00008f25.bin
1d5bfe071d637e9d2e50c5fb5b7188ea05f996a35e527faf8130e8d7b3a67163		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F25 11088 bytes

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