Malicious PDF — malware analysis report

Static analysis result for SHA-256 1997f09b6adc7214…

MALICIOUS

PDF

43.7 KB Created: 2020-08-30 08:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2120e9ec2316c0730025431b1ee3a6f SHA-1: bf3fe2c0fb4b766c0bfa14702f7a00484e92a44f SHA-256: 1997f09b6adc7214dd28d35abcf081ce6fca25a800ff478f14df2ec0539a5aea
262 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document also exhibits social engineering lures, including a 'download button' and a 'recovery secret' request, aiming to trick the user into clicking the malicious link. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is designed to lead users to malicious infrastructure for potential malware delivery or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=wondershare+dr.+fone+for+android+tor
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/48161504822.pdf
    • https://cdn.shopify.com/s/files/1/0457/8849/6038/files/sozesovatufe.pdf
    • https://cdn.shopify.com/s/files/1/0438/3391/7590/files/95670493271.pdf
    • https://cdn.shopify.com/s/files/1/0437/0805/5720/files/apraxia_da_fala.pdf
    • https://cdn.shopify.com/s/files/1/0435/4713/2063/files/ordering_decimals_percents_and_fractions_worksheets.pdf
    • https://static.usrfiles.com/ugd/b8c837_e03b998dd02543e581a86a6f2010f241.pdf
    • https://cdn.shopify.com/s/files/1/0432/7273/2836/files/getapovenaxite.pdf
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/merriam_webster_geographical_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0432/7908/9824/files/72300221417.pdf
    • https://static.usrfiles.com/ugd/451461_cf812c65d4eb4db1960c096e9414f587.pdf
    • https://static.usrfiles.com/ugd/c0b427_2679cf241cd14ea5a97585380062c688.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_off00006e05.bin
134016cc07629dba510d6ff5d9ab57e2e3957bc5ecf333cc18a1e10d8a70a397		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E05 5008 bytes
font_01_sfnt_off00007f16.bin
94132ac522924dda9ff060681c25c4a35f20ef6139c6039285c3106d79ed59bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F16 10264 bytes

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