Malicious PDF — malware analysis report

Static analysis result for SHA-256 f89d7a03cbc9fe97…

MALICIOUS

PDF

50.4 KB Created: 2020-08-10 09:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e597fb2da702cb186f960614e0aa27be SHA-1: d1711903a863d0e57f2c43811c6e92d92695cbf6 SHA-256: f89d7a03cbc9fe978bc7dc324aab88d1ca244be37154be129a67fded6a5e4fa4
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL, https://ttraff.cc/pify?keyword=plan+metro+tram+amsterdam+pdf, is flagged as malicious. This indicates the file's purpose is to lure users into clicking these links, likely leading to further malicious content or exploits. No scripts were extracted, and the document body was heavily obfuscated, but the heuristic firings strongly suggest a malicious redirection scheme.

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=plan+metro+tram+amsterdam+pdf
    • http://sozasik.nataliecanderson.com/uploads/1/3/1/6/131636664/muduvivevufubuveji.pdf
    • http://files.caseyharvilla.com/uploads/1/3/2/7/132712214/vevuzupakaki.pdf
    • http://files.bioskosmoschurchgov.org/uploads/1/3/0/8/130874086/rodopotetowup.pdf
    • http://rutunufep.risenkingchurch.com/uploads/1/3/1/3/131380213/ad19248a03992.pdf
    • http://files.gphsmanufacturing.org/uploads/1/3/2/6/132681670/wazufinu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/2965817326.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/tugaruwefopa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/gasifikasi_biomassa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4699/3052/files/zelelorog.pdf
    • https://cdn.shopify.com/s/files/1/0429/2096/8351/files/74104224187.pdf
    • https://cdn.shopify.com/s/files/1/0430/5544/8213/files/24468120973.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/95382082657.pdf
    • https://cdn.shopify.com/s/files/1/0434/1796/0604/files/87170606845.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/17749604492.pdf
    • https://cdn.shopify.com/s/files/1/0433/6363/1272/files/33942188844.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/basic_english_grammar_test_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007998.bin
1ba293afb17864ba45f56350c394e146984e8c65ec64db1b0de32992d9258528		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7998 4928 bytes
font_01_sfnt_off00008a37.bin
4c33bc5c6bf962098136320627b4af2574d42dc059f25d05a4cd18c101018f60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A37 10932 bytes
font_02_sfnt_off0000ae9a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE9A 4324 bytes

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