Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce17560edbca755…

MALICIOUS

PDF

42.0 KB Created: 2020-08-30 16:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeb4ebe856142c4268a1c203e7a5d902 SHA-1: feab8887da6c67a0508972b72a436cac914ba67f SHA-256: 5ce17560edbca7553d6d03c91a738ac95b35ce614124836c833eb6788278a896
154 Risk Score

Malware Insights

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

The PDF file contains embedded links that point to a known malicious redirector, ttraff.com, which is designed to lead users to potentially harmful content. The document body, though heavily obfuscated, contains text related to 'aroma professional rice cooker instructions' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of numerous external PDF links, many pointing to static.usrfiles.com, indicates a potential link farm or SEO spamming operation.

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/wix?keyword=aroma+professional+rice+cooker+instructions
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/bb13a2_a690b4dea55542bd899b8acc24733841.pdf
    • https://static.usrfiles.com/ugd/b8c837_86fce33d88d24af9b0187d99524497b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_799fc3ec7588419b9818c07b63ee78e6.pdf
    • https://static.usrfiles.com/ugd/a382ee_d0fee76e347f476e96785d2a561c8b0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a18ba193d13a474e8a1566e23e2796db.pdf
    • https://static.usrfiles.com/ugd/b8c837_aeff4ba2c74d4a128f8b9975cb84a643.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d430ccb5b81406c9a0a03817b608c0e.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/basic_rules_of_mathematics_algebra.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/67020023721.pdf
    • https://cdn.shopify.com/s/files/1/0428/7440/5020/files/virtual_frog_dissection_lab_answers.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c19a8902a1b48d4ace64db7cc354acc.pdf
    • https://static.usrfiles.com/ugd/efb3f0_b41c36dc5a774e8ca857e703e794fa52.pdf
    • https://static.usrfiles.com/ugd/c3548c_88d25db90b5742b89b2451fef75658ef.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_off000065de.bin
e53f3e1335e08cbfbc2a26d4c5693ddaef4aca97c8f6cbf70051ea05add272c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x65DE 5212 bytes
font_01_sfnt_off00007783.bin
7b10fbe1ccf59fb9d5cb87a909157488b58c3ad99e39ac47c16d2adff4ec3b43
pdf-font-stream PDF embedded font (sfnt) at offset 0x7783 10352 bytes