Malicious PDF — malware analysis report

Static analysis result for SHA-256 736253bfee147764…

MALICIOUS

PDF

45.5 KB Created: 2020-08-15 02:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 571717d37df6518164f479cbdbae7b35 SHA-1: f1ab2e90b51bed10414ceaa14cddaafaf37cdb2c SHA-256: 736253bfee147764f0fc6df12fd1d03016e5d97769b86a2655b66463241145c6
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a redirector URL, which is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'UAE ID card registration form' and a URL that appears to be part of a link farm. The presence of multiple links, including one to a known malicious redirector, suggests an attempt to lead the user to malicious content or a phishing site. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=uae+id+card+registration+form
    • http://fodarog.celltheon.com/uploads/1/3/2/8/132814930/6848498.pdf
    • http://files.davesmithrants.com/uploads/1/3/2/7/132740378/jivodilodiloraf_verofewotek_sebunudelebuni_nekafiritin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/bedford_reader.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kazapuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2805/files/carnatic_music_varnam_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/1275/1523/files/childrens_cardigan_knitting_patterns_to.pdf
    • https://cdn.shopify.com/s/files/1/0429/6910/4540/files/151284336.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/bugifemagadikonotiga.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/surenizewotabovitez.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/rozarel.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/104775570.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fd7.bin
fd5180a5077d67a416ebe9286376ef7337b9b9b97da3f36e5e029c9660ef5286		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD7 5088 bytes
font_01_sfnt_off00007106.bin
e6e6dbc473852ffead714d365da8ad2dd443bc4a9797ca1057abf4e723d1466b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7106 13420 bytes
font_02_sfnt_off00009b5c.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B5C 4324 bytes

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