Malicious PDF — malware analysis report

Static analysis result for SHA-256 57cd6b582eb07831…

MALICIOUS

PDF

40.0 KB Created: 2020-08-22 06:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 167de63dc4542b3b09e26ad6fe17caef SHA-1: ad5e8b402cf3af262e99a83c1cccb968ce95f4ff SHA-256: 57cd6b582eb0783159bcb62f8dea551562198f2210a06224f25bde50e9e8cd55
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on 'cdn.shopify.com', suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=functions+of+infinitives+exercises+with+answers
    • http://nemibuz.ostendmarineservices.com/uploads/1/3/0/7/130738836/913396.pdf
    • https://cdn.shopify.com/s/files/1/0434/2638/1975/files/wenibuneputo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9822/5320/files/borovakoku.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/pisonisedasojutefe.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/27979419263.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/cisco_catalyst_3650_series_switches_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/7723/8945/files/352537242.pdf
    • https://cdn.shopify.com/s/files/1/0434/1789/5070/files/42235501926.pdf
    • https://cdn.shopify.com/s/files/1/0438/9509/5464/files/jejafeden.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/anger_management_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/9887/3762/files/30532757741.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/lol_runes_guide_adc.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/86352229664.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/classical_and_statistical_thermodynamics_carter_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0434/4925/4048/files/21886484360.pdf
    • https://cdn.shopify.com/s/files/1/0435/3179/6634/files/pafenamitemidexopomeluni.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_off00005fb3.bin
94a57341371c6557c1777c2e016c6e2aec098d159cdda9edab7237a046fe0ee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB3 5112 bytes
font_01_sfnt_off0000712a.bin
d2d876fd49e1e5de9a5c46325cb5b2a68399fb8d6acf9ee000317f981e6644cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x712A 9924 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.