Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6bf7a03ea57256c…

MALICIOUS

PDF

44.0 KB Created: 2020-08-03 13:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1535f4405d96c6ce118d1f2ce9a02a5b SHA-1: 01adaf67f4e9a319830aef5b07d0e564681ab811 SHA-256: e6bf7a03ea57256c24a471df11cbdbb34ea5b3bcd1ca1bc7225c7e23aaa7f124
152 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=dwg+trueview+plot+to+pdf'. The document body, though partially corrupted, contains text related to DWG TrueView and PDF conversion, suggesting a lure to trick users into clicking the malicious link. The presence of a large number of external PDF links also indicates a link farm, likely for SEO poisoning or to distribute further malicious content.

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=dwg+trueview+plot+to+pdf
    • http://files.bulutmak.net/uploads/1/3/1/4/131407164/rabubupuxaz_tasomo.pdf
    • http://files.microsoftconsult.com/uploads/1/3/0/7/130775732/4122f.pdf
    • http://files.dentalequipmentonlinestore.com/uploads/1/3/0/8/130874161/gidufavefozovo-nusafu.pdf
    • http://files.art2art.org/uploads/1/3/0/7/130776407/b2568ca047b83.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/27520562479.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/moxoxozetoped.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/41560353049.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/janidasajuwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/44659102865.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/89238256518.pdf
    • https://cdn.shopify.com/s/files/1/0435/5601/2191/files/affine_cipher_python.pdf
    • https://cdn.shopify.com/s/files/1/0445/6103/9524/files/how_to_use_wine_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6665/files/synonym_for_teacher.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66916333827.pdf
    • https://cdn.shopify.com/s/files/1/0434/6704/7077/files/9449756975.pdf
    • https://cdn.shopify.com/s/files/1/0438/7163/3563/files/prot_warrior_talents_classic.pdf
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/99998153934.pdf
    • https://cdn.shopify.com/s/files/1/0447/0344/9241/files/austin_traffic_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/4849957055.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_off00005e7e.bin
efc273c41ad1e37b94448463b08a94cb01c0bc64a4d5d7b750fdba9d3db9a05e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7E 3936 bytes
font_01_sfnt_off00006ca9.bin
ce08b19cee8d1fb4a1fa23fc987a1c43477c0e6c3dfe01b64a94e862fb483d87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA9 4972 bytes
font_02_sfnt_off00007dcd.bin
804f7bb81fbc104dccc146a7f7a4d6f9af55de109c85da30a06d0967f666b54b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCD 10728 bytes

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