Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6fcad6fdd9cd82…

MALICIOUS

PDF

57.7 KB Created: 2020-08-08 05:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22aa682f2db4f7060449c89a4ce8a318 SHA-1: 2cd832889436309031c8116a1c08d5070d831ba8 SHA-256: df6fcad6fdd9cd822b211d3c6a6c7c507f22c1399995471cb12fdc58868fd798
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector at 'ttraff.com'. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to academic topics and URLs, suggesting a lure to trick users into visiting potentially harmful sites.

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=makalah+apbn+dan+apbd+pdf
    • http://files.fernandoulibarri.com/uploads/1/3/0/7/130739116/tozumimedimurekos.pdf
    • http://files.artedelaura.com/uploads/1/3/1/4/131406258/6151681.pdf
    • http://files.drmrosenfeld.com/uploads/1/3/1/4/131408204/c1bacfd92fb910.pdf
    • http://files.ruthlouisesingleton.co.uk/uploads/1/3/1/8/131857115/koviwelovevapu.pdf
    • http://files.littlewisheshire.co.uk/uploads/1/3/0/7/130740130/tonumiz-nexixal-pusugile.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/comparative_superlative_exercises_elementary.pdf
    • https://cdn.shopify.com/s/files/1/0438/2756/0598/files/weber_carburetor_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/lazozekerofadefavasajixi.pdf
    • https://cdn.shopify.com/s/files/1/0440/4733/5574/files/vuxamixapivarojutotabax.pdf
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/33606919583.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/4002/files/18915213321.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/gta_v_scripts_folder.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/zalozanijowonaxifukifarin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/9453/9429/files/clicker_heros_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/ruzovenokefetator.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009c8c.bin
81e0a764fdbc9791166b20ae2935f2309876bacd3d150e4c5eb7fcad2c96a944		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8C 1780 bytes
font_01_sfnt_off0000a52f.bin
dde4103d477bc0528b3f6d8e361e3589283df16b5edaf784b72c75bd09ca6df9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA52F 5064 bytes
font_02_sfnt_off0000b670.bin
3a50cf94b4f2d8c44d7f3913f7fe08f8fc4bfec6b5512138cd89ccd700a7a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB670 10144 bytes

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