Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb8c2f5acd82ea3…

MALICIOUS

PDF

40.0 KB Created: 2020-08-09 11:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 246c85fe320d5a15ef253ab52b004bc8 SHA-1: 5cddd05b670e4d5d39f74ef61e2bb56bd40a269d SHA-256: 3cb8c2f5acd82ea36be4e4074f9032fe177b4e82d741885e78d58eca5d68e357
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a diet smoothie recipe PDF. This indicates a phishing or social engineering attempt to lead the user to malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for the attack pattern.

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/pify?keyword=body+reset+diet+smoothie+recipes+pdf
    • http://files.reginacoupar.ca/uploads/1/3/0/7/130738848/wotizapajuvakeso.pdf
    • http://files.tmi-photo.com/uploads/1/3/0/7/130776164/f9cb313b7904.pdf
    • http://files.shirleywatsonfinancial.com/uploads/1/3/1/4/131453512/2cafea7d3fba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46391305542.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/convert_file_to_word_document_using_adobe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7313/files/11024422680.pdf
    • https://cdn.shopify.com/s/files/1/0439/4660/6760/files/26870075488.pdf
    • https://cdn.shopify.com/s/files/1/0431/8511/1203/files/68621010832.pdf
    • https://cdn.shopify.com/s/files/1/0433/4115/2421/files/43953556194.pdf
    • https://cdn.shopify.com/s/files/1/0434/7641/8713/files/calculus_and_differential_equations_in_engineering_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/javascript_basic_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5481/6665/files/54245401317.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/vajafexofawixavib.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_off00005e46.bin
e9f7c9c7e119ed7a6741262547211d74a9a5e64ed2d4c2bfd5f4c7e2bf6aba58
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E46 5304 bytes
font_01_sfnt_off00007036.bin
ce5bc65f63af9d408b5d4d143eaa0b7484e60d552d73df6b6ca8385a8334a5c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7036 10304 bytes