Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d56a05891d56cf2…

MALICIOUS

PDF

35.4 KB Created: 2020-08-18 15:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cffa6188a53aa947dc39902201be0c8b SHA-1: dc8be417f2e9b9ea276cb19c4c198cfc3313de7d SHA-256: 1d56a05891d56cf2e814fb39024175db56c40893d1536a774a4f5b304dc077ab
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to a link farm infrastructure designed to redirect users to potentially malicious sites. The primary redirector URL, https://ttraff.ru/pify?keyword=3+roller+pipe+bending+machine+pdf, is flagged as malicious. The document body itself is heavily obfuscated but contains references to the redirector and other URLs, suggesting a social engineering lure to trick users into clicking malicious links.

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=3+roller+pipe+bending+machine+pdf
    • http://files.puterbaughcollection.com/uploads/1/3/0/8/130813694/balepevaza.pdf
    • http://files.doicontrol.com/uploads/1/3/0/7/130776388/3188830.pdf
    • http://files.worldofmusicpc.com/uploads/1/3/1/6/131636914/05685ed529.pdf
    • http://files.artforyoubyq1.com/uploads/1/3/1/4/131437982/waviditi_navogujulusip.pdf
    • http://files.scenichillretreat.com/uploads/1/3/0/9/130970009/1380681.pdf
    • https://cdn.shopify.com/s/files/1/0440/8072/6168/files/dobesadirolonitotoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/seek_the_old_paths.pdf
    • https://cdn.shopify.com/s/files/1/0432/1263/6322/files/coldwell_banker_logo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9081/9739/files/42705924545.pdf
    • https://cdn.shopify.com/s/files/1/0432/5464/4894/files/fikugemobilobapuzud.pdf
    • https://cdn.shopify.com/s/files/1/0433/4298/7423/files/just_eat_plc_annual_report_2019.pdf
    • https://cdn.shopify.com/s/files/1/0439/4831/0683/files/conversion_de_grados_centigrados_a_fahrenheit_y_viceversa.pdf
    • https://cdn.shopify.com/s/files/1/0440/4966/2117/files/ablixa_drug_information.pdf
    • https://cdn.shopify.com/s/files/1/0433/3935/0181/files/5556825216.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/zupafoge.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/alcoa_fastening_systems_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0427/9071/5548/files/vewigiwojati.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_off00004b7f.bin
ac1b24a6e03a578169c8e4403666fb9eb6968cbd13346966c62a8638c80033cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B7F 5600 bytes
font_01_sfnt_off00005e4f.bin
f9f3337b1188af51e56bc8c9c7f09732db3993f97deba6b66188f4f4f17c1a93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4F 10068 bytes

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