Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ca9186923357a8…

MALICIOUS

PDF

44.3 KB Created: 2020-08-30 17:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a09dd1f2d3f5ca52d378db5106ed554d SHA-1: f105c13ca2877ca23a7a3f5515bdbf5ca7c4662d SHA-256: 17ca9186923357a8dadb85721d17348eb1ac2fb51e52bd574105888fc4595c6e
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free template download, which is a common lure for phishing attacks. The ML classifier strongly indicated maliciousness, and the PDF was flagged for linking to known malicious infrastructure. While no scripts were directly extracted, the PDF structure itself contains embedded URLs that lead to potentially harmful content.

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.ru/wix?keyword=free+catholic+wedding+program+template+downloads
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/blush_faces_of_shame.pdf
    • https://cdn.shopify.com/s/files/1/0431/3477/9553/files/lodakip.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/22417241476.pdf
    • https://cdn.shopify.com/s/files/1/0437/4711/5157/files/are_tumble_dryer_sheets_toxic.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1724/files/penom.pdf
    • https://static.usrfiles.com/ugd/b8c837_d03c5b973cf44b979260c8ccfe8d9224.pdf
    • https://static.usrfiles.com/ugd/b8c837_f52ec25b35d0407d8f27524e9b91a89d.pdf
    • https://static.usrfiles.com/ugd/df4650_7db6c628603b49b990719eaa5b3aecf9.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/mesavun.pdf
    • https://cdn.shopify.com/s/files/1/0450/8113/3219/files/xutewojak.pdf
    • https://cdn.shopify.com/s/files/1/0431/7767/2868/files/45991814586.pdf
    • https://static.usrfiles.com/ugd/db1da1_71d712e18445468ca32179f4f96a0657.pdf
    • https://static.usrfiles.com/ugd/b8c837_22fce6fc27c9450e922b808bbd7a702b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006017.bin
013c26201bd249121e8526b59bcd7f304afd97d20703db1542781bfbdb369b79
pdf-font-stream PDF embedded font (sfnt) at offset 0x6017 5320 bytes
font_01_sfnt_off0000720b.bin
1e55176451ecb94bbb346ef46ea32de23be0c77b995c80f10bba6d0e87881fa1
pdf-font-stream PDF embedded font (sfnt) at offset 0x720B 11104 bytes
font_02_sfnt_off00009657.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x9657 4324 bytes