Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddead0b7fddf1a02…

MALICIOUS

PDF

41.1 KB Created: 2020-08-03 18:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e777f90501063888a61b4cb148b6f8b SHA-1: ea1c6816fbc92891602e567c5a053862066e9151 SHA-256: ddead0b7fddf1a027eb2eb5bf38e5db418b5723680bc34d311efd5dab75f904e
152 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com. This redirector is likely used to funnel victims to a phishing page or a malware download site. The ML classifier also strongly indicated maliciousness. The document body itself appears to be a garbled mix of text and URLs, including the malicious redirector URL and several benign-looking Shopify links, suggesting an attempt to obscure the malicious intent.

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=mario+benedetti+no+te+rindas+pdf
    • http://files.marksmotivation.org/uploads/1/3/0/8/130813731/6689325.pdf
    • http://files.sweetwatersaddlery.com/uploads/1/3/1/1/131163540/samipu.pdf
    • http://files.highheartcrystalhealing.com/uploads/1/3/2/7/132740692/gaxofiregavokur-vitifu-funibeso.pdf
    • http://files.isrcincinnati.com/uploads/1/3/2/8/132815882/pebesivaruseze-rexosuvut-rijuluwitoxira.pdf
    • https://cdn.shopify.com/s/files/1/0438/3227/9200/files/51484450188.pdf
    • https://cdn.shopify.com/s/files/1/0433/8771/5742/files/60956085964.pdf
    • https://cdn.shopify.com/s/files/1/0438/4984/2850/files/97839019294.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/principles_of_mathematical_analysis_rudin_walter.pdf
    • https://cdn.shopify.com/s/files/1/0432/3255/9263/files/most_common_user_agent.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/devil_in_i_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/kayla_itsines_bbg_2._0_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/77920606992.pdf
    • https://cdn.shopify.com/s/files/1/0439/0912/0152/files/39493499746.pdf
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/8520227594.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/17888570991.pdf
    • https://cdn.shopify.com/s/files/1/0430/0744/3103/files/54103866644.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_off000064a8.bin
a6a723339a5902744671f63721abb9c7a055a9a2a1065f952641d6308690b982
pdf-font-stream PDF embedded font (sfnt) at offset 0x64A8 5148 bytes
font_01_sfnt_off00007639.bin
da58afe76868cd841cdc5e21e4fd9f99d29effa161f71d465b2ffbcd43a7dcb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7639 9652 bytes