Malicious PDF — malware analysis report

Static analysis result for SHA-256 c04592bedce4bdc6…

MALICIOUS

PDF

41.9 KB Created: 2020-08-31 09:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fc73fcfc58ff0e3f6d6521f2bc727c3 SHA-1: 26bf5eca49c354ecea32a46ae3b4905c97023437 SHA-256: c04592bedce4bdc63bb976fdaa74db74e3f63ade5068a4d753e9af077d300e19
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=panasonic+sc+ap01', which is flagged as malicious. Additionally, a large number of links to PDFs hosted on Shopify are present, suggesting a link farm or SEO manipulation tactic. No scripts were extracted from this sample.

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.ru/wix?keyword=panasonic+sc+ap01
    • https://cdn.shopify.com/s/files/1/0429/8457/1031/files/76642817097.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/january_2017_geometry_regents.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/541923644.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/nowolutamebajisujoger.pdf
    • https://cdn.shopify.com/s/files/1/0465/8354/6023/files/CONVERTIR_SAN_MANGUANA_EN_MP3.pdf
    • https://cdn.shopify.com/s/files/1/0434/6370/4729/files/new_words_in_english_with_meaning_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_44446b3c1a6a4b4ba78a40b073a90c71.pdf
    • https://static.usrfiles.com/ugd/374ce0_acab846fc20245c190c92435e6713e83.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e4e2a1d621446939847d2da4ef603dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_506f562396bf4f09bcbc7d1bd30129cd.pdf
    • https://static.usrfiles.com/ugd/c1de29_1ab13907733642aca2da81ad607b44aa.pdf
    • https://static.usrfiles.com/ugd/432b07_08883f55ee2a41768ddb03b482d2867e.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_20084353ea81488ca5450079f6fb2a8b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c17.bin
334cfb5caf2de2a6392c3fd848e3ca70c2296f1c88ee8275f738c665b50502e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C17 2860 bytes
font_01_sfnt_off00006641.bin
242d568fc645747d3cb46210648b5df338beac39d7ce9f5344dae4d2d465951c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6641 4996 bytes
font_02_sfnt_off00007750.bin
2e758c8c90aeca18e25e730a4015bbb633d1cb3ea72d3670e73e8f31822ae391		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7750 10552 bytes

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