Malicious PDF — malware analysis report

Static analysis result for SHA-256 f992b238a74300d3…

MALICIOUS

PDF

41.0 KB Created: 2020-08-05 05:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1944555672b32bdbe9af96c3b858cbb0 SHA-1: e1437eae282d8eae82e47790a3c4cfb562669a86 SHA-256: f992b238a74300d306c2a0f9cbf3f9a4f5533cf18f31e8664e72e4d067c9bf6b
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which is a common technique for distributing malicious content. The document body, though heavily obfuscated, contains the text 'Dnd character sheet 5e pdf fillable' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, further supporting 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.cc/pify?keyword=dnd+character+sheet+5e+pdf+fillable
    • http://files.whitneyhorrocksfineart.com/uploads/1/3/0/7/130740193/dfd8c03.pdf
    • http://files.glutenfree-woman.com/uploads/1/3/2/6/132696060/guxenatonugut.pdf
    • http://files.sognocakes.com/uploads/1/3/0/8/130874316/zitivajakukesas.pdf
    • http://files.basingstokeconsortium.co.uk/uploads/1/3/1/4/131483201/7462761f2f1.pdf
    • http://files.creativecounselingsrq.org/uploads/1/3/2/7/132710787/5366484.pdf
    • https://cdn.shopify.com/s/files/1/0433/2067/2409/files/22475719402.pdf
    • https://cdn.shopify.com/s/files/1/0440/4648/3606/files/toxozipanigi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3974/files/87853919924.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/lajunukejunax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46552055365.pdf
    • https://cdn.shopify.com/s/files/1/0438/3545/7696/files/buxekopepagomipokeve.pdf
    • https://cdn.shopify.com/s/files/1/0432/4058/7423/files/value_proposition_canvas_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/watch_bad_girls_club_season_16.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/webimedokovin.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/fitivaji.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1726/files/nonemokesama.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_off00006106.bin
e9276e32532fa94e7dfb403ae71ce9ddbd6d4ceb73c2c9d63c4cdd56622bdd6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6106 5504 bytes
font_01_sfnt_off000073ba.bin
21c07314ea5d2ed0fd5e68afc66e981cd5fef22d151f6accd55ed00176acaaff
pdf-font-stream PDF embedded font (sfnt) at offset 0x73BA 10332 bytes