Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c2b45f0db9c78e…

MALICIOUS

PDF

47.3 KB Created: 2020-08-12 06:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dc002a9f603ea68ca351a1927dfc006 SHA-1: cafedd8963d488b1bc0ac4ad591c65a1ae96d146 SHA-256: 72c2b45f0db9c78efd5889d48b36574cea0632b04bfa7e37aafc65282cd1c656
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector at 'ttraff.com'. The document body, though partially obfuscated, contains the same redirector URL and appears to be a lure for academic-related content. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or SEO manipulation.

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/pify?keyword=leadership+styles+pdf+thesis
    • http://files.juliewilder.net/uploads/1/3/0/7/130775758/famesagisulali.pdf
    • http://files.bauhausblog.com/uploads/1/3/0/7/130775053/sojusasarezo.pdf
    • http://files.designsbysarahmeyer.com/uploads/1/3/1/4/131437246/nowolan.pdf
    • http://files.breastlearningonline.com/uploads/1/3/1/3/131380213/zoxuravosizurem_vewasoto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3254/1344/files/88732438082.pdf
    • https://cdn.shopify.com/s/files/1/0428/9177/2063/files/46757375468.pdf
    • https://cdn.shopify.com/s/files/1/0432/4877/9426/files/assistant_manager_accounts_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/motepejodivi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5338/3833/files/vopatenibexinal.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/wozonosuwasuluvix.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/zusiruvux.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/wuwubuxudutopimunulepug.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/fijurerenususuzog.pdf
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/jerafakaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9495/0556/files/84025918114.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/jcb_506c_parts.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0421/files/11194022242.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/xotibivezorusuta.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007aad.bin
cc4b50e3a0efb59a76363c4c39a60e71cbf5a791496481fed775f389a0dda33b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAD 5172 bytes
font_01_sfnt_off00008c47.bin
13eecc11f7c1fa8715d3624f3a92c0623811954ff528349f7dcd601f107d53ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C47 10980 bytes

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