Malicious PDF — malware analysis report

Static analysis result for SHA-256 6613df0bdfc3e9b0…

MALICIOUS

PDF

45.7 KB Created: 2020-08-06 13:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be70c0e37ab066de97b6f3bbd036933c SHA-1: e0e23aecf1a03e9b7007fde0dc7356234cdfa234 SHA-256: 6613df0bdfc3e9b026b8a9a05507026a413a5f739d266f6d37488b19c64fec5c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector at ttraff.com, disguised as a Dungeons & Dragons 5e Warlock spells PDF. The presence of embedded URLs and the ML classifier's high confidence indicate a malicious intent to redirect users to harmful content. While no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to distribute malicious content or phish users.

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=dnd+5e+warlock+spells+pdf
    • http://files.lowcountrydressforsuccess.org/uploads/1/3/1/8/131860787/e911069092f6.pdf
    • http://files.kholabakso.com/uploads/1/3/0/7/130775556/7497996.pdf
    • http://files.spygamereviews.com/uploads/1/3/0/9/130969356/pojegeboniregudarap.pdf
    • http://files.travelinggiftbox.com/uploads/1/3/0/7/130776409/608608.pdf
    • http://files.superawesomegadgets.com/uploads/1/3/1/3/131379277/85605.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7075/8816/files/nozanidowovolivisuvobapu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9745/files/78586867421.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/fedavusamebelawujap.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/nikumasajelutex.pdf
    • https://cdn.shopify.com/s/files/1/0437/8502/7746/files/mawewewaketajegediwuliz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4201/files/9935353911.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/new_vegas_unofficial_patch_plus.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/xodixe.pdf
    • https://cdn.shopify.com/s/files/1/0440/7872/7318/files/5852160117.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/90958764874.pdf
    • https://cdn.shopify.com/s/files/1/0427/7554/3964/files/teachers_pay_scale_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0435/7393/6291/files/fefutawesogidu.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_off00007554.bin
1832b6a7fd74c413a83e661d5004f211cd62f06b5f559cce3c255c21176b8e95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7554 5428 bytes
font_01_sfnt_off000087f8.bin
4db8b81f494ab6d3db388fb666c2f36d53e51fc24c23a9aad2805f6fdc24a19f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87F8 9996 bytes

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