Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb1dbee282b2630…

MALICIOUS

PDF

35.2 KB Created: 2020-08-05 17:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8632ab97d644c77caa623b66437ae45 SHA-1: fe74cc02c5ba729451e5a6913719d0dd1743a9a4 SHA-256: abb1dbee282b2630aa9413985da122d22e440b28ff2d599723d1577ef2e1b80e
152 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 a known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=bill+karwin+sql+antipatterns+pdf. This indicates a social engineering attack aimed at directing users to potentially harmful content. No scripts were extracted, and the document body was largely unreadable, but the heuristic firings strongly suggest a link-based redirection attack.

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=bill+karwin+sql+antipatterns+pdf
    • http://files.rhondastruminger.net/uploads/1/3/1/0/131071076/1562942.pdf
    • http://files.lookwellblog.com/uploads/1/3/0/7/130776366/sefowamux.pdf
    • http://files.gregsebire.com/uploads/1/3/2/7/132740541/6226901.pdf
    • http://files.immanuellutheran-sterling.com/uploads/1/3/0/8/130873893/54849390.pdf
    • http://files.suekodress.com/uploads/1/3/1/4/131408502/guzog-bofexezug-gugifiwur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/suwolusalugidepugemafok.pdf
    • https://cdn.shopify.com/s/files/1/0438/6642/3456/files/nugebeforufovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6317/files/53488003291.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3641/files/sermones_expositivos_listos_para_predicar.pdf
    • https://cdn.shopify.com/s/files/1/0432/3059/3192/files/zilefajejarurixerosu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6921/0773/files/wuzisezasafofaxadigadu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/lupimabal.pdf
    • https://cdn.shopify.com/s/files/1/0436/9213/0458/files/kavigatevoda.pdf
    • https://cdn.shopify.com/s/files/1/0439/8972/9438/files/imagine_reading_a_post.pdf
    • https://cdn.shopify.com/s/files/1/0438/4853/2128/files/dewejufakolalukudojupowo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3140/files/latest_research_topics_in_electronics_and_communication_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0432/4209/4755/files/piziwofibopituvulamavirub.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_off00004d76.bin
d5af22496df971516a90e93961271410a0348fa0dc83cb1b7c7fd224c3871f7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D76 5368 bytes
font_01_sfnt_off00005fda.bin
cd35d5ca426651f459a70c5c40111c4983e27a0f1ff60f9d0c5efe6fcb18eb10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDA 9320 bytes

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