Malicious PDF — malware analysis report

Static analysis result for SHA-256 e466bc900b061c9a…

MALICIOUS

PDF

49.7 KB Created: 2020-08-31 01:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e83fc9dd9c1d3c35525840aa7b16a26f SHA-1: 3d368bc68417e71dcd90de68f0b07401d2413d16 SHA-256: e466bc900b061c9afd7576c63351f45e5656a5a5b7569eac12ee065c9d1df4d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a deceptive title 'Upgrade server 2003 to 2012 r2' and embeds multiple links. One link points to a known malicious redirector, ttraff.com, which likely serves as a lure to further malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests a link farm or redirection strategy. No scripts were extracted, but the PDF structure and embedded links indicate a social engineering attempt to redirect the user to 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.com/wix?keyword=upgrade+server+2003+to+2012+r2
    • https://static.usrfiles.com/ugd/b8c837_dc3a4bf614a94e6e851c34e062a6ec3f.pdf
    • https://static.usrfiles.com/ugd/b8c837_2de0a9dc2c264526926d7851542ac9a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_32d3486222454cd68abd59b2f62f3870.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_769a6d2936be4421926bca9f26e325c6.pdf
    • https://static.usrfiles.com/ugd/930050_45d64e303d8d44a2ba5752465a0cdec7.pdf
    • https://static.usrfiles.com/ugd/277b62_27873cf2def3409a9cc7e69efb97bb9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d193595e5684cb6b97e0b0c04bd15f8.pdf
    • https://static.usrfiles.com/ugd/1e32c2_cad0c27594e04bb887e592dfc4dfe12a.pdf
    • https://static.usrfiles.com/ugd/63d3ad_1268c91728b74d84a9b16f236980bcb8.pdf
    • https://static.usrfiles.com/ugd/8ba634_f0a15bd712c142a1819077b673daa124.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1f7a7240fc547119f6dc051bed9310f.pdf
    • https://cdn.shopify.com/s/files/1/0454/5786/6902/files/terapi_dermatitis_atopik.pdf
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/24256559961.pdf
    • https://cdn.shopify.com/s/files/1/0433/0291/2158/files/42225042844.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/st-_119._1.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
stream_005_off00009f33.bin
244862f57292ec0fa35975d65debe5b1f9a30e49627765392c266e33c7512f60		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9F33 17668 bytes
font_00_sfnt_off000066d7.bin
5fba4579e4893d681b912c759d7ec20dc277147906432317620301b93f56834e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D7 5636 bytes
font_01_sfnt_off00007a1a.bin
e0364ae954d3ae59c602bd9d625259e7e3c0135b7beb9ceef69bb5ba1bf439f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1A 10792 bytes

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