Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f26da0ef01d437b…

MALICIOUS

PDF

46.4 KB Created: 2020-08-01 11:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24d2babf035ab9574bc5f1eee034deef SHA-1: ac70e69cf5428e66764b210aa072d9144d67e409 SHA-256: 9f26da0ef01d437bdc422324312dcc047e5f4dcae87353feb998dfe346fffc76
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=intermediate+accounting+14th+edition+pdf', suggesting a lure to a malicious site disguised as a search result for an academic document. The ML classifier strongly flagged this PDF as malicious.

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=intermediate+accounting+14th+edition+pdf
    • http://files.theartofclearing.com/uploads/1/3/1/4/131437410/mesuratir_wokujedazota.pdf
    • http://files.hkcfoundationforparkinsons.org/uploads/1/3/1/6/131636584/8547916.pdf
    • http://files.silkroadcarpets.com/uploads/1/3/0/7/130775727/letituta_seladegonipolig_xijilofa.pdf
    • http://files.mindykannon.com/uploads/1/3/2/6/132695701/1c88e31d4.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tizisixurodegu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/fudakozoladejofokar.pdf
    • https://cdn.shopify.com/s/files/1/0431/0201/1548/files/jopidinowoki.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/sowabinajarejuxeketexas.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/transporter_3_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/30232201474.pdf
    • https://cdn.shopify.com/s/files/1/0434/4361/7959/files/diretet.pdf
    • https://cdn.shopify.com/s/files/1/0437/7837/5831/files/34467432864.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/3800228506.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/rorigize.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/tolabigepikuniga.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/28299688375.pdf
    • https://cdn.shopify.com/s/files/1/0428/6454/1852/files/41625942669.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9068/files/jelaxatulazefonoruwozixu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007346.bin
e0cb34ee8bb1e391ce62849b586eeaccc853b424aac1810ca514ae5cb9093f05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7346 5436 bytes
font_01_sfnt_off000085a4.bin
6925744850560d265ea167d3aed34981bfb515ca2604dc6c01418bc35c9fa6a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85A4 12164 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.