Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c56d0d89c04de65…

MALICIOUS

PDF

52.5 KB Created: 2020-08-12 21:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19e8796e6773d220d3f27ef955684599 SHA-1: df3fd3c2d80bd5a816fe6ab1a7c682fd0a5d1cc0 SHA-256: 2c56d0d89c04de659c048693c1f23d7b1c37c61872a2eea22060f891e475d157
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=mosaic+authorship+of+the+pentateuch+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many of which are hosted on Shopify. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL, suggesting it's the primary lure.

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=mosaic+authorship+of+the+pentateuch+pdf
    • http://files.kansascarryconcealed.com/uploads/1/3/0/7/130740242/7705061791c5d.pdf
    • http://files.seasidecdc.com/uploads/1/3/1/1/131163578/zosuzudegowil_ganozifaf_mojimusubatex.pdf
    • http://kuzapup.rickerskinderkamp.com/uploads/1/3/0/7/130775320/sujose.pdf
    • http://files.tauroafarmandwildexperience.com/uploads/1/3/0/7/130776877/fdf83fe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1550/files/history_of_english_literature_and_literary_forms.pdf
    • https://cdn.shopify.com/s/files/1/0431/5342/4540/files/all_breed_dog_grooming_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/3431/8760/files/jonazusonegikavu.pdf
    • https://cdn.shopify.com/s/files/1/0450/6091/5350/files/ibdp_biology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/fomegewaramazasulefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6453/files/is_maxthon_a_virus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/rita_pmp_exam_prep_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/5933/7621/files/sisugivamoti.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/mariner_15_hp_outboard_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0446/9764/9306/files/jeep_patriot_manual_transmission.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/74187848753.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/kolowitaveminunisogosur.pdf
    • https://cdn.shopify.com/s/files/1/0432/6631/0299/files/wordly_wise_book_7_lesson_5_answer_key.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090d6.bin
ebc56edad33ca79c9c8ca92cb045510594b44a907ae40564563e6c5d31b462cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90D6 5216 bytes
font_01_sfnt_off0000a293.bin
685b406d668dbe02b1c69aab1099dcdd4f480b105ba4ee2bfea60f2b6a464011		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA293 9980 bytes

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