Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1f8f5f11d5b0d67…

MALICIOUS

PDF

45.5 KB Created: 2020-11-01 15:20:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c83b659fe1c54761ffd222efcdcb165 SHA-1: 75a23902b061c7fc904a8511e80a3c17acf64ce5 SHA-256: a1f8f5f11d5b0d67f5fb03bf0f450836e319a0e05d3c2bd1a349ea6894405c5c
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links and a QR code lure, directing users to potentially malicious URLs. The ML classifier strongly indicated maliciousness, and a critical heuristic identified a link to known malicious redirector infrastructure. The document's content, though obfuscated, appears to be a lure for downloading further content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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.me/123?keyword=bradshaw+travel+guide
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/wupovuniregumemava.pdf
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f925f4e962bd.pdf
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/zakitakesopizev.pdf
    • https://cdn-cms.f-static.net/uploads/4403805/normal_5f969cc110c42.pdf
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/bibipo_rosenaragiwefu_nirijumopemij.pdf
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/6a23c1c.pdf
    • https://cdn-cms.f-static.net/uploads/4382772/normal_5f8c3e1c35706.pdf
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/rajojul.pdf
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f8d6e70b255f.pdf
    • https://cdn-cms.f-static.net/uploads/4402289/normal_5f91a47d88e90.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5367/0822/files/63069857347.pdf
    • https://cdn.shopify.com/s/files/1/0500/9955/2447/files/82459598646.pdf
    • https://s3.amazonaws.com/wizidimawag/61093612798.pdf
    • https://cdn.shopify.com/s/files/1/0501/9792/1975/files/kuwufu.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_off000061f2.bin
037878e49874e411285959db519d4229fc501371a0d78a5424a1249e0ae23822
pdf-font-stream PDF embedded font (sfnt) at offset 0x61F2 4264 bytes
font_01_sfnt_off000070e6.bin
8253dfb3572349a06e504966702c16d159f165b90139b382ee94b2ae02066623
pdf-font-stream PDF embedded font (sfnt) at offset 0x70E6 5288 bytes
font_02_sfnt_off000082f6.bin
e2e34b4de84eaf59d64878808d19a8583a2602702f0d79f46b73aa490150443c
pdf-font-stream PDF embedded font (sfnt) at offset 0x82F6 11280 bytes