Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2c6ba91ad064ee…

MALICIOUS

PDF

34.0 KB Created: 2020-09-16 21:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61b25ab72d02d3af0ac5b1e862d4a32b SHA-1: 13bab032fef1d48a33b1de8d67f4fb41c0c6892a SHA-256: 5e2c6ba91ad064eef31bae502ffb232c5f02a814834cb1576f3d05dd35ff67dd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text and URLs that suggest a lure related to game content, specifically 'strike force heroes 4 unblocked'. The presence of many external PDF links further indicates a link farm or redirection strategy. No scripts were extracted, but the primary attack vector appears to be directing users to malicious 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.club/wix?keyword=strike+force+heroes+4+unblocked
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2d129e52-396f-4335-b1da-bf9172dd4bb6.filesusr.com/ugd/e1c37d_ec370a9c22fb4ee399e9d2ddab0a720e.pdf?index=true
    • https://3bf90728-c8f7-42c2-a7dc-342ffc640bbf.filesusr.com/ugd/4bb894_ecb7a96310a54929a7e64ee9d94d8e41.pdf?index=true
    • https://d15614a5-e069-43e2-a6d3-9740a8fe9f1c.filesusr.com/ugd/d6af85_552c678306b5426dac26d3734ca64b96.pdf?index=true
    • https://288bc8de-7e4b-442b-8020-f4330432d827.filesusr.com/ugd/e3c460_48a687572198423d9395b0b4f0bdf352.pdf?index=true
    • https://94f9906f-a76f-4f65-85c4-049496cca471.filesusr.com/ugd/bdc04d_e021ca6df477483ead8ec4e1ec766c44.pdf?index=true
    • https://88dbc538-d328-4d96-9d58-d298a70e0ace.filesusr.com/ugd/cfa91a_32fdc1cbab1c40e0b9f62edd1c0362d8.pdf?index=true
    • https://6f82af1d-7e24-441d-8622-0bc0ca1737f7.filesusr.com/ugd/de3d83_27ffd16d7e7d46d8acd50520a7fc677c.pdf?index=true
    • https://6f1eed06-09bf-47e8-a78f-4e9b766dfc6c.filesusr.com/ugd/1b8612_0176097b965d4bbd93c5590490fc256c.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/3908/8022/files/dell_optiplex_3010_diagnostic_lights.pdf
    • https://cdn.shopify.com/s/files/1/0433/4023/4917/files/the_economist_magazine_august_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/5257/1555/files/irda_mock_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/nifiwetuxobaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4390/4927/files/cermet_potentiometer_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/94159358276.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004754.bin
8a1955e914390b347846e4257627dea9116fe6948854948daebe1475da641d19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4754 5296 bytes
font_01_sfnt_off00005957.bin
3f01a11eb398cb5cd66805801a116e7d2c1c9618a0ce891790da43ecc5c0021d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5957 9964 bytes

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