Malicious PDF — malware analysis report

Static analysis result for SHA-256 77dfe3a9eb4eee19…

MALICIOUS

PDF

69.7 KB Created: 2020-08-31 05:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96cf9a766587204774f54b5ae40b8829 SHA-1: 965b39b659168e49a4808baf0230d6fb4c4865fa SHA-256: 77dfe3a9eb4eee1918d2368429bba518c71dc6a7164b9aa27ca3e42f71d86325
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to a redirector infrastructure. The primary malicious URL identified is ttraff.me, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links, suggesting an attempt to drive traffic to malicious sites, likely for phishing or malware distribution.

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.me/wix?keyword=el+cholo+que+se+vengo+cuento+complet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_d67b4c963fb44659a47360a24d2ee498.pdf
    • https://static.usrfiles.com/ugd/f967ac_6da24fb3dbaf41cdbf3dd6d4f3c7b15d.pdf
    • https://static.usrfiles.com/ugd/8127dd_f90cd0e771de48ab9d2aa5b296848eb2.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2534/files/advanced_algorithmic_trading_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1285/files/vajojewos.pdf
    • https://cdn.shopify.com/s/files/1/0428/2269/7126/files/sadixefiwo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8055/files/vimofutiwasufu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6348/files/telling_time_worksheets_hour_hand_only.pdf
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/ansi_c84_1_download.pdf
    • https://static.usrfiles.com/ugd/5926b4_d761804461cc4f3582f4504d73732b34.pdf
    • https://static.usrfiles.com/ugd/7baf93_12c7f029111341eebefdb48d4a146e43.pdf
    • https://static.usrfiles.com/ugd/63022f_a05c4e4e7aed42b3aca532ee1de5ca92.pdf
    • https://static.usrfiles.com/ugd/40b9e6_820f0d1d992c489b96feebe574615b35.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_off0000d132.bin
48b4a0dc74a896e07bc2dffe680e3f708d93a2c75a4dd491951109cd8c0511db
pdf-font-stream PDF embedded font (sfnt) at offset 0xD132 5184 bytes
font_01_sfnt_off0000e2b7.bin
8da29733fe841cddc3aa7985533510d7f5cde04c442ef6b81be9b2b0aed8cb9c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B7 11616 bytes