Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff9d247d3f266b7…

MALICIOUS

PDF

53.0 KB Created: 2020-08-23 03:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d7f9b71068de8c26632e27121a5dbe3 SHA-1: 897087ae448d6641c45ef4f222825ec3b5f08768 SHA-256: 7ff9d247d3f266b7b0090bbdfc837c4de13f6ae1663a298204ac7037d375da48
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded external links, with a critical heuristic firing indicating a link farm pointing to a redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=hardest+naruto+quiz+with+answers, which is likely used to obscure the final destination of the attack. The ML classifier also strongly indicated maliciousness.

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=hardest+naruto+quiz+with+answers
    • http://files.actingcoachlasvegas.com/uploads/1/3/2/6/132681566/lejele.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/email_template_size.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/blood_in_blood_out_imdb_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4920/files/63645636646.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3253/files/reset_nintendo_switch.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/28901633027.pdf
    • https://cdn.shopify.com/s/files/1/0440/7328/7830/files/79826651633.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/osrs_demonic_gorillas_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/1111/3123/files/13853091914.pdf
    • https://cdn.shopify.com/s/files/1/0432/2118/8763/files/24358214220.pdf
    • https://cdn.shopify.com/s/files/1/0439/3825/0910/files/bunny_kingdom_rulebook.pdf
    • https://cdn.shopify.com/s/files/1/0448/3439/0178/files/maps._me_android_review.pdf
    • https://cdn.shopify.com/s/files/1/0434/4479/7607/files/autocad_to_converter_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/jivulemapopi.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/
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/osrs_demonic_gorillas_g

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009292.bin
ccb1d288d86bc2b0503cb5afbd6c33a1650dcd929fbce7e1c721c640676cd09e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9292 5112 bytes
font_01_sfnt_off0000a3ff.bin
f28249810a9669fea69201490baca530c5f3f249737d5236e2aacc5ba912344f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3FF 10224 bytes