Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed774c66e4e536a4…

MALICIOUS

PDF

52.5 KB Created: 2020-07-27 16:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e73d120e64858734f7d837ead2e43098 SHA-1: 8ce317299054670c8ee2c7960cf0a4d864272176 SHA-256: ed774c66e4e536a4e53510ac3938236dda098740681e16c9857916044ad98490
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external links, with the primary domain being 'cdn.shopify.com'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to be a lure related to '4 qul surah in english pdf'. The combination of these factors suggests a malicious intent to redirect users to harmful content.

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.cc/pify?keyword=4+qul+surah+in+english+pdf
    • http://files.annalisalosangeles.com/uploads/1/3/1/0/131070591/wijemepo.pdf
    • http://files.baltimorespa.net/uploads/1/3/0/8/130874299/4635519.pdf
    • http://files.luvlearnlaughter.com/uploads/1/3/1/8/131856173/kofirejugabe.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/78192436177.pdf
    • https://cdn.shopify.com/s/files/1/0432/6106/7428/files/96336640841.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/81952769424.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1969/files/46038871041.pdf
    • https://cdn.shopify.com/s/files/1/0431/2530/9604/files/wuromefunelepedupir.pdf
    • https://cdn.shopify.com/s/files/1/0428/4229/2390/files/jewod.pdf
    • https://cdn.shopify.com/s/files/1/0433/7968/7587/files/44396976544.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/72343459691.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14192803693.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/8317547700.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/gugakowolukejidobibad.pdf
    • https://cdn.shopify.com/s/files/1/0432/6742/4412/files/96276680376.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/92470920978.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_off0000769b.bin
a40e5d08a6069c84ca37044c47c53b8663d57f45793f6255a9f6758c5aca3541		 pdf-font-stream PDF embedded font (sfnt) at offset 0x769B 5112 bytes
font_01_sfnt_off000087dd.bin
8fa698e3156546db702c4d11c6f6c42472991fdd7fc0e090bcfbaa124fa9093e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87DD 10108 bytes
font_02_sfnt_off0000aa9d.bin
065d57a1000d3672c749218a3f1182980b4f2c0fb15528076ceb6837cf2ed053		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA9D 17300 bytes

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