Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0d41f5499004c2…

MALICIOUS

PDF

99.0 KB Created: 2020-09-14 02:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b924f542c865e3093926ac9f9308243 SHA-1: 923c3773743241cc91d80d4d6df740c7bc98308b SHA-256: 0f0d41f5499004c25d272e87692973065e0161e4d524356f559e5708b1a06057
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=hamlin+juice+oranges+vs+navel+orange'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary purpose is to redirect users to potentially malicious content. No scripts were extracted, but the presence of numerous external links and the malicious redirector strongly indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.cc/wix?keyword=hamlin+juice+oranges+vs+navel+orange
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://static.usrfiles.com/ugd/225520_a0a37ab99df948d194a0dad7f39a9324.pdf
    • https://static.usrfiles.com/ugd/97634b_2b99ed80b10f45758708ed61838cf4da.pdf
    • https://static.usrfiles.com/ugd/7603ae_f3142aaba7c146e8a226db499f8c7b09.pdf
    • https://static.usrfiles.com/ugd/b8c837_73d299d862fd4e2e9863d1280a5e008d.pdf
    • https://static.usrfiles.com/ugd/3d0627_6accbda9b87341b7bd3209379336413a.pdf
    • https://static.usrfiles.com/ugd/fbccce_bc8cac280f1144eeb28206ebebfffea0.pdf
    • https://static.usrfiles.com/ugd/011e4b_90608a1916624716889c45417caead3b.pdf
    • https://static.usrfiles.com/ugd/45e30f_628e932d47634ca4b58e547b3af2e2e3.pdf
    • https://static.usrfiles.com/ugd/6350c7_f6dcfcc8b2374ff8a1c4ec09c982061b.pdf
    • https://static.usrfiles.com/ugd/fb83f1_d6a8f4fc5b4b40be99287440f57ece34.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/lopibulemute.pdf
    • https://cdn.shopify.com/s/files/1/0435/8560/1693/files/9091169032.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/60942871427.pdf
    • https://cdn.shopify.com/s/files/1/0433/1021/9422/files/43441660864.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f49.bin
10535b48122474d7cdd851741742f6d2a0e57217d0dccc4f9a7f9684315a1631		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F49 5216 bytes
font_01_sfnt_off000120f4.bin
805d0b5858df5829fcb724179978077b82d9cf907dc84de2d7c45a3c28119824		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120F4 2792 bytes
font_02_sfnt_off00012c07.bin
cdffda242c75e0c2a10e5ce023394343e4647bf105155d4964118f43754ad5af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C07 12508 bytes
font_03_sfnt_off000154d2.bin
112297b5ab4010b4c6d8fdb47209b36637f227ce9a8d662ca1473d3dd04879d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154D2 18332 bytes
font_04_sfnt_off00017256.bin
de8dfa3aa6116157c354b72aecf48b258adb7f90382d68cf22cff4cea6e71fbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17256 2788 bytes

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