Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae322d48a171483…

MALICIOUS

PDF

35.0 KB Created: 2020-09-09 07:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddf2bca9bdfaed8fb02b83661e9bd4d5 SHA-1: 63281bdac59fe7aabf7fe6d4dae2d2d34e1654da SHA-256: dae322d48a171483ea1ddc5257f9c24be9669786216d54200868aa7b433e6693
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.me/wix?keyword=escape+room+game+level+104+answer', is identified as a malicious redirector. The document body, though partially corrupted, contains text related to an 'escape room game answer' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious link. The presence of numerous other links to 'static.usrfiles.com' indicates a link farm, a common tactic for SEO poisoning and traffic redirection.

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.me/wix?keyword=escape+room+game+level+104+answer
    • https://static.usrfiles.com/ugd/90661f_3b8164f884194294b7f57b457f23fc7f.pdf
    • https://static.usrfiles.com/ugd/7ff653_28c4f5296f8f436bb201764fb25a682a.pdf
    • https://static.usrfiles.com/ugd/957eb4_010d9884934e4f46858697204dd407ac.pdf
    • https://static.usrfiles.com/ugd/1cc777_5d8dbcfff9274d93a2dfd2bdb38ce394.pdf
    • https://static.usrfiles.com/ugd/b8c837_582e8594b21e426ab2e43ed936f35e88.pdf
    • https://static.usrfiles.com/ugd/e2a635_6d7cec23dc004dd2a2835df2b612384f.pdf
    • https://static.usrfiles.com/ugd/65d6f7_7e72390058b546668ec98b8361186fd2.pdf
    • https://static.usrfiles.com/ugd/23e9be_fdaa8d2f74774584b876754bb6ca832e.pdf
    • https://cdn.shopify.com/s/files/1/0460/3310/9156/files/how_old_are_dogs_when_they_are_full_grown.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/bahubali_full_hd_movie_300mb.pdf
    • https://cdn.shopify.com/s/files/1/0437/1306/9210/files/aemo_commissioning_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9685/files/syllabication_rules_in_english.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_off00004980.bin
87d3c549600d51bc399bb38725e69dc9ee5a1cc31327fdbd89494b89ed610c11
pdf-font-stream PDF embedded font (sfnt) at offset 0x4980 5644 bytes
font_01_sfnt_off00005cc3.bin
0e48e7555b8efed08a7992bc005526268e90b61f141233a4dba364021127bd13
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC3 10160 bytes