Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf598d25240da1b…

MALICIOUS

PDF

43.7 KB Created: 2020-08-12 16:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e91e3ad18e5fb4902873045910ef2c63 SHA-1: 6970c96b3500e3b4935ae0b2e4e8fadc49d1c938 SHA-256: ddf598d25240da1b8b4fae71aab48ce9324198ea3775c1c241138871867d0241
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, including one to a known malicious redirector, ttraff.com. The document body and embedded links suggest a lure to a "creation kit tutorial pdf", likely a social engineering tactic to drive traffic to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF structure includes a link farm.

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=creation+kit+tutorial+pdf
    • http://kutuzif.saintgerardcircle.com/uploads/1/3/0/7/130776791/raturasidoke.pdf
    • http://retibovob.pegasustherapyot.com/uploads/1/3/2/6/132695663/zarewifupenumu-tulegobaxopi-zuxefe.pdf
    • http://files.flamelilyarts.com/uploads/1/3/0/7/130776514/580159.pdf
    • http://files.satiramquarleschristiananthologies.org/uploads/1/3/0/9/130969403/rejazegenavu_tinagix_fowivilebe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4895/9141/files/vejuveto.pdf
    • https://cdn.shopify.com/s/files/1/0440/6876/5848/files/63275630882.pdf
    • https://cdn.shopify.com/s/files/1/0431/7865/5903/files/sjogren_syndrome_journal.pdf
    • https://cdn.shopify.com/s/files/1/0432/4058/7423/files/convertir_a_word_editable_ocr_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/3134/7868/files/piwaxit.pdf
    • https://cdn.shopify.com/s/files/1/0431/3825/2954/files/os_argonautas_do_pacfico_ocidental.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/computer_algorithm_examples.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.pdf
    • https://cdn.shopify.com/s/files/1/0432/8734/7360/files/enviando_e_mail.pdf
    • https://cdn.shopify.com/s/files/1/0433/4311/8495/files/tennessee_williams_the_glass_menagerie_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0563/9836/files/biomagnetic_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/bronconeumonia_sintomas.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_off00006e0e.bin
d25fa89b15665085c58db16bdd6951affa5e046f6de14af4820392e4cdc32f4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0E 4828 bytes
font_01_sfnt_off00007e85.bin
c631418936f5664f28c1140ef17322ddc8cff94ce1838c8a3d8817c7fe581871
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E85 10320 bytes