Malicious PDF — malware analysis report

Static analysis result for SHA-256 07411d0a24638c5a…

MALICIOUS

PDF

47.4 KB Created: 2020-08-11 09:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4be1a410de6a0dcf300d710e52fafbcf SHA-1: 272a10ad4578e5d4289aefe166132a1541e87f29 SHA-256: 07411d0a24638c5acb09d05bbfda46ece9af116b44de7ec11ed3ec02c6b2529d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, masquerading as a document about curriculum development. One of these links, 'https://ttraff.cc/pify?keyword=stages+of+curriculum+development+process+pdf', is identified as a malicious redirector. The presence of a large number of external links suggests a link farm or redirection tactic to obscure the final malicious destination. 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.cc/pify?keyword=stages+of+curriculum+development+process+pdf
    • http://files.condzellasfarm.com/uploads/1/3/0/9/130969555/97c8dd5b0b0479.pdf
    • http://files.alisonletsos.com/uploads/1/3/0/7/130739234/mofulekadovaxu_jigetuzo.pdf
    • http://files.cleanlifecolonic.com/uploads/1/3/0/7/130738700/sojofetivete-fejetovo-wetafejotowalut-tiguxa.pdf
    • http://files.miningintelligencecapital.com/uploads/1/3/1/8/131872286/forafa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71299233386.pdf
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/apparel_manufacturing_technology.pdf
    • https://cdn.shopify.com/s/files/1/0433/3607/3366/files/26355648656.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/divib.pdf
    • https://cdn.shopify.com/s/files/1/0427/4873/9740/files/fugotivuvamufize.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9213/files/lonely_planet_cuba_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3553/files/60690888687.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/current_divider_rule_for_3_resistors_in_parallel.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9030/files/gmat_sample_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/daxugonuvidaraxiputagirob.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006599.bin
3b3317733cf87b2123316b097ab85e9ad844c22a98900c7d6fddd7aeb0a51086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6599 5636 bytes
font_01_sfnt_off000078b3.bin
98f60d465df2f5b620c516aec6bf4c502d03b06c086bb42f65bb089e28ca1447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B3 10044 bytes
font_02_sfnt_off00009b47.bin
becf56af0d70e232eaaf79c87901fc8a96bb45ad577c2f1beefdb411fd79e0d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B47 16180 bytes

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