Malicious PDF — malware analysis report

Static analysis result for SHA-256 54cf093538deded1…

MALICIOUS

PDF

86.3 KB Created: 2020-10-31 07:01:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42b3c0327735e70b7634d58c21cd2acf SHA-1: 7967e276aa0e514bad41c9a62c621e4209756e39 SHA-256: 54cf093538deded1432b88e06abfde0c1b127b868a04b8ff89fa268b7b0a9fd9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. This suggests the PDF is designed to direct users to malicious sites, likely as part of a phishing or scam campaign.

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://ggtraff.ru/123?keyword=dr+stein+soul+eater+head+screw
    • https://rurevudo.weebly.com/uploads/1/3/4/2/134265418/33c394f13.pdf
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/c385a54d925d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f084831c-42c1-4a67-9fac-8e1476bff416/mojavadepamupukubekudit.pdf
    • https://uploads.strikinglycdn.com/files/5860962a-5bbb-4373-b5a2-1864e9f568ba/aspe_domestic_hot_water_heating_design_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9901/1738/files/99140814925.pdf
    • https://uploads.strikinglycdn.com/files/2e5b4b36-20e4-4866-b9b3-02ca846a5718/27021513650.pdf
    • https://uploads.strikinglycdn.com/files/797f1a58-7900-40ed-a097-d038704e8088/wejegegazoxejadibuxibo.pdf
    • https://cdn.shopify.com/s/files/1/0505/2006/4172/files/27758561525.pdf
    • https://cdn.shopify.com/s/files/1/0501/3864/4645/files/unpack_dark_souls_for_modding_remastered.pdf
    • https://cdn.shopify.com/s/files/1/0505/4804/8057/files/wubajinuwoxememigufe.pdf
    • https://cdn.shopify.com/s/files/1/0437/4347/7909/files/34390174388.pdf
    • https://uploads.strikinglycdn.com/files/2b6265af-2b1d-4b02-963a-605c31c1b6d4/wuxur.pdf
    • https://uploads.strikinglycdn.com/files/1ae009a1-9def-4ade-a5c4-fcd370eff8bb/11897362733.pdf
    • https://cdn.shopify.com/s/files/1/0483/4685/7635/files/libopadoler.pdf
    • https://uploads.strikinglycdn.com/files/dd51e5f6-acbc-4d9e-8f1f-47bd12bbfaee/4253373510.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000b638.bin
0d80e7017830ecc1cca516524a12ed0ae314cdf21ff9d8a4a0a0ef4d807860f1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB638 17448 bytes
stream_007_off00012596.bin
911087e868cfae615404fc8bfa466d98b1321e3367471a882c9f815cc4a34786		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12596 20916 bytes
font_01_sfnt_off0000eed2.bin
2b64da7b0022d97c2000a5391499a0d7831317ccdc03bc0f031b2a4706c049dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEED2 5120 bytes
font_02_sfnt_off00010047.bin
760f5ed8932839c76f70ab89a55431462dc7190aa4c6bb0c5d603a47120e837e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10047 10956 bytes

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