Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f266690760d375…

MALICIOUS

PDF

43.2 KB Created: 2020-11-03 10:59:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d62d79f3c27c588cea87fab9d4d80dbf SHA-1: bb5e331a9cee3f93d3661e65b428c069873edb54 SHA-256: e5f266690760d375bb8b341c7d315a6bdb5ba2afacbbe3f0ffa82ab6db90cd3e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.club'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into visiting a malicious site under the guise of accessing game-related content. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute 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.club/123?keyword=bash+the+computer+unblocked+games In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375894/normal_5fa09ca540a52.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/1202/8092/files/47587091747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2915/0882/files/g27_racing_wheel_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5452/8181/files/objective_c_tutorial_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/81276884525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7481/6674/files/caliper_guide_pin_grease_autozone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4114/7038/files/fosovixupuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d366b94d-3a64-44cb-8c56-8b616097b832/51365405897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/657e3c0f-aa2a-4737-81b1-df567cb8106d/77594112583.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/fikapozixekag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2163/8081/files/salton_induction_cooktop_costco_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/lilly_pathophysiology_of_heart_disease.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/7763/0873/files/26983418234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e6a54f5-ae87-4f58-a451-fc4918c22142/yugioh_forbidden_memories.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000675a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675A 5740 bytes
SHA-256: 56b19b40700704ab6881050d949ee0a0b6de6b1b1d14a264a38e8c68e57b36ae
font_01_sfnt_off00007aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA8 10936 bytes
SHA-256: 4d98ddb8277df1f1d2638f737df08fd5929d91d0b687af8df9aabb05c1976931

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