Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e52b1832d660b41…

MALICIOUS

PDF

39.5 KB Created: 2020-08-24 20:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14e53587120cbaa570567401eadc1297 SHA-1: ca04438ebd8cfcaf5d6e8a6ebd11c8ec7cb2c305 SHA-256: 3e52b1832d660b41457ea2bce65151bf55736de3557526afcb0eab4ed3e849db
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector at https://ttraff.com/pify?keyword=all+might+wallpaper+android+hd. The document body, though heavily obfuscated, contains this same URL, suggesting the primary purpose is to redirect the user to malicious infrastructure. The presence of a large number of external PDF links further supports a link farm or redirection 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=all+might+wallpaper+android+hd
    • http://files.fvapbotb.com/uploads/1/3/1/4/131438784/2152436.pdf
    • http://files.fracturedpottery.com/uploads/1/3/0/7/130775490/tazumevotilejaju.pdf
    • http://kuturol.healthyenvironmenthealthychildren.com/uploads/1/3/0/7/130739811/8eee5a70bde.pdf
    • http://files.egatecoc.org/uploads/1/3/2/6/132680808/9df78a08aa2.pdf
    • https://cdn.shopify.com/s/files/1/0440/8049/6792/files/5163680675.pdf
    • https://cdn.shopify.com/s/files/1/0431/1751/0818/files/4785856975.pdf
    • https://cdn.shopify.com/s/files/1/0431/4680/5408/files/46591773362.pdf
    • https://cdn.shopify.com/s/files/1/0437/9354/7426/files/currency_converter_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/52712157994.pdf
    • https://cdn.shopify.com/s/files/1/0431/6993/9612/files/wakodutaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/4987266104.pdf
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/logical_fallacies_quiz_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/5690/6918/files/zagabe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/24780788090.pdf
    • https://cdn.shopify.com/s/files/1/0431/7996/6628/files/60157322247.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/vandane_vandane_savira_vandane_kannada_song.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_off00005ceb.bin
566af8f7edb172723558bf71fb6686225e9264c4618c42958cf928cc5877ee90
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CEB 5276 bytes
font_01_sfnt_off00006ebb.bin
469bb8efe1159cfd7349cf05cbb323b6a4106bceb312b2d421d8fbde6b5f0f2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBB 10060 bytes