Malicious PDF — malware analysis report

Static analysis result for SHA-256 72330a3f015734ea…

MALICIOUS

PDF

49.7 KB Created: 2020-08-18 15:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e24f7671da744e926f9cc5e962b0f0a SHA-1: 7b253252aa94df8d25609f6307842afa199e7bd7 SHA-256: 72330a3f015734ead477a8180edda6e5559f9473950fb47d0c5153362ebecab2
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body also contains a URL that appears to be part of a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=gazette+name+change+form+online+gujarat
    • http://files.jimpetersgolf.com/uploads/1/3/0/7/130739831/rawejewaxujob.pdf
    • http://teburuzaw.interculturallanguageservice.com/uploads/1/3/1/4/131438120/5366777.pdf
    • http://files.sweetwoodhavanese.com/uploads/1/3/1/3/131379830/bezebuxipe-doniram-sigemovotaz-tugakowomolakiz.pdf
    • http://files.parentspeace.com/uploads/1/3/2/6/132695258/rawezale.pdf
    • http://notito.slingsandroundabouts.com.au/uploads/1/3/0/7/130776485/fimivodowejinukiw.pdf
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/Copyright
    • http://www.typoland.com/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/7937/7830/files/nikugekora.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3574/files/fire_emblem_cool_rom.pdf
    • https://cdn.shopify.com/s/files/1/0440/6139/3046/files/lesofafivebokuzisosu.pdf
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/zegarusik.pdf
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/butterflies_are_free_script.pdf
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/54078307867.pdf
    • https://cdn.shopify.com/s/files/1/0436/8692/0347/files/65232244222.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/84859068384.pdf
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/amnesia_a_machine_for_pigs_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/9512/9254/files/14079151281.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/togopuzisegoke.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006730.bin
9f07a400e75c177e496f395344003d4a7545e118b36bf59d530d47f9bb3550f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6730 6168 bytes
font_01_sfnt_off000076cf.bin
bd57cf5f536106130be9bec1814280bdaf4433eb3347750e03fc1363bee5c9dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76CF 5156 bytes
font_02_sfnt_off0000883c.bin
02f0f280557c886a889ba8f53d9fd5f72791ed69f720cb0cb8a7e6f6f8473d42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x883C 10216 bytes
font_03_sfnt_off0000ab0b.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB0B 4324 bytes

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