Malicious PDF — malware analysis report

Static analysis result for SHA-256 97df114a18696f6d…

MALICIOUS

PDF

39.1 KB Created: 2020-08-11 16:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f5dd8720525e1b23794b7ae9437d175 SHA-1: 4efa1efe28287195cf8c74a26377e04c93937141 SHA-256: 97df114a18696f6dd89de4bf48ad6589083c4bd9bfac5e126529a0c15aabe9a4
152 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, including a critical redirector link to 'ttraff.com'. The document body, though partially garbled, contains text related to PDF downloads, suggesting a lure. The presence of a link farm and the ML classifier's high confidence further support the malicious nature of this document, which is designed to redirect users to potentially harmful sites.

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=bv+ramana+engineering+mathematics+pdf+download
    • http://wedokixan.buytopiary.com/uploads/1/3/1/1/131164250/panujakumepiko_fepugozirekaji.pdf
    • http://files.celebrationrotarypancakerun.com/uploads/1/3/2/6/132695701/66cf32b1379.pdf
    • http://wumufap.sajecorp.com/uploads/1/3/2/6/132681746/2954264.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/gukos.pdf
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/fivijoxemiwun.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/45807720549.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/vunotabonifajalijege.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/91015262870.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/simaparidilodotaj.pdf
    • https://cdn.shopify.com/s/files/1/0439/2907/5880/files/star_trek_the_motion_picture_watch_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3357/files/degozedomipepe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6939/0500/files/fokewo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/crimes_of_the_heart_script.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004434.bin
5ff24e4a651459f75942e3e629b3a22f18adeb73e3391b19763f41f3f92bd796
pdf-font-stream PDF embedded font (sfnt) at offset 0x4434 5768 bytes
font_01_sfnt_off000057bc.bin
375b2c038570b92b2a24f0ef0c12bca5908193b93638de56980a79d131ed99cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x57BC 9488 bytes
font_02_sfnt_off00007853.bin
c6a82bb012cb2541900dd448056fe6fa26a0a6686cc5b9167886e28d78186460
pdf-font-stream PDF embedded font (sfnt) at offset 0x7853 16096 bytes