Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd51d74109d4e563…

MALICIOUS

PDF

43.7 KB Created: 2020-08-13 08:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: deba31d53bfd0a5380db1aa5b93e743d SHA-1: e586a9a4300f860bc39066d3f724592f949ab9e5 SHA-256: cd51d74109d4e563d6592be34e9b44c2f951c7e33acaf1c74b7f70b1cd306598
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body text and embedded links suggest a lure related to inserting PDF files into PowerPoint, likely a pretext for SEO manipulation or redirecting users to malicious sites.

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/wb?keyword=can%20you%20insert%20a%20pdf%20file%20into%20powerpoint
    • http://rakudogu.colecountygenealogy.com/uploads/1/3/1/3/131379730/ribisipifo.pdf
    • http://files.kvrclub.com/uploads/1/3/0/7/130775940/jasedotajifu-tupuke-patawuboro.pdf
    • http://fafozowuk.uccellos.com/uploads/1/3/1/3/131398455/zokifaninogaka.pdf
    • http://files.scatteredsacred.com/uploads/1/3/1/3/131383931/kuxumoxeme.pdf
    • https://cdn.shopify.com/s/files/1/0448/6466/7810/files/anlamli_hikayeler.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1144/files/edexcel_igcse_human_biology_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/69314143900.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/tiwimanumarajusilumin.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/fobajomof.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/factorio_blueprint_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8101/files/bovogidojowirasujukisol.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/44752318650.pdf
    • https://cdn.shopify.com/s/files/1/0438/3506/4480/files/bases_of_market_segmentation_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6820/files/zeniked.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/ramadan_calendar_2020_dubai.pdf
    • https://cdn.shopify.com/s/files/1/0430/2484/2906/files/96792295945.pdf
    • https://cdn.shopify.com/s/files/1/0428/3134/7868/files/vujevitotojifokumilese.pdf
    • https://cdn.shopify.com/s/files/1/0432/9439/2485/files/8782434951.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_off00006cb1.bin
95cbc53ec400a92b6ecf0418ff32ab314aaa905e5b989d4582d7c41f1f3f9224		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB1 5136 bytes
font_01_sfnt_off00007e52.bin
48307f4fedd7f5d061f8dada99d60cc94968e9b073810661f0b8fbd0f00f0c2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E52 10128 bytes

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