Malicious PDF — malware analysis report

Static analysis result for SHA-256 c342e912cd0c1248…

MALICIOUS

PDF

41.1 KB Created: 2020-09-18 05:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c83c99875c1bd079faff72da30040c69 SHA-1: 3b7cbee593fc6a0e28c710801e6817d3de9b4ba6 SHA-256: c342e912cd0c124815725f3da579c7520aa3a8834810c7df5bc03e8764f96152
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=star+wars+revan+libro+espa%25C3%25B1ol+pdf'. This URL is likely part of a phishing or scam campaign designed to trick users into downloading further malicious content or visiting compromised sites. The document body, though heavily corrupted, also contains this URL and numerous other links hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for 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/wix?keyword=star+wars+revan+libro+espa%25C3%25B1ol+pdf
    • http://files.manrug.net/uploads/1/3/1/4/131438211/8bc29dd5c.pdf
    • http://xorasape.lhbsa.org/uploads/1/3/1/4/131453784/5874005.pdf
    • http://files.westfielddentalpa.com/uploads/1/3/2/7/132741052/sesuxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6071/files/aws_ec2_instance_types.pdf
    • https://cdn.shopify.com/s/files/1/0429/1765/8780/files/tanitoli.pdf
    • https://cdn.shopify.com/s/files/1/0481/7918/3767/files/15691635197.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/97449751243.pdf
    • https://cdn.shopify.com/s/files/1/0485/2619/6898/files/gonukuzofusotal.pdf
    • https://cdn.shopify.com/s/files/1/0432/0519/7985/files/silosusitira.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/donulufexozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/1549411192.pdf
    • https://9a1ba745-0af5-4068-a84b-f26c42b6b0d2.filesusr.com/ugd/ab0441_acb586521ce0409f98b06bd8dfdcf5b3.pdf?index=true
    • https://a2b4004f-0259-4156-95ac-6536bf127e44.filesusr.com/ugd/c4ccc4_008cc1fc6d044b738a2942ade6dd2bec.pdf?index=true
    • https://ea4989fb-6f3e-4692-8c0c-6a847d728bcb.filesusr.com/ugd/0fdb6d_6b122fd8d7b540619fcfa4010008d8c3.pdf?index=true
    • https://15fea0bb-89e8-49dd-8579-eaab4f09789a.filesusr.com/ugd/fbccce_227aa224c6fc4e8b8fbcc06b18c00a09.pdf?index=true
    • https://bfb7aedd-8e3a-4e25-927e-2175aa72d501.filesusr.com/ugd/2e16aa_3e53eb83b98a46ff879739edd522bfe0.pdf?index=true
    • 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_off0000600a.bin
a35a1df45bff589c9a9d0458d7e50f44abd83fcb1334beb946bf8480330099a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600A 5640 bytes
font_01_sfnt_off00007312.bin
e00d61369810a3f3a45e5abd18cda19deec4af817048873686421c8511f98598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7312 10156 bytes

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