Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc5f1bce4d62ec03…

MALICIOUS

PDF

53.7 KB Created: 2020-08-23 06:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 002da6f8a3501f892b287034839538d2 SHA-1: 9414e39657874b3501d35fca4c10d49968fe6f92 SHA-256: cc5f1bce4d62ec0306de2c3c3933215507235634efa1348c3c20ff3bdbaa099d
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily corrupted, contains the URL 'https://ttraff.cc/pify?keyword=hyperkalemia+management+guidelines+pdf', which is also listed as a malicious redirector. This suggests the document is designed to trick users into visiting malicious sites, likely for phishing or to download further malware. No scripts were extracted, and the PDF structure itself is the primary vector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=hyperkalemia+management+guidelines+pdf
    • http://files.brain-wiselearning.com/uploads/1/3/1/4/131406600/xazotitepe.pdf
    • http://wefafa.amsbandandchoir.com/uploads/1/3/1/4/131408999/xuvalujexalinupowomo.pdf
    • http://files.dolibersclassroom.com/uploads/1/3/1/4/131438077/7349155.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7653/files/an_introduction_to_cardiovascular_physiology_levick_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/2040/0286/files/tipotobevu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/candidate_relationship_management.pdf
    • https://cdn.shopify.com/s/files/1/0460/9405/7636/files/60657688321.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/brigid_kemmerer_elemental.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/80100166598.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/bakugajakinakofa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5084/files/cascarilla_de_arroz.pdf
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/51391038799.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/remekowola.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008646.bin
a2904a905d83ecd7da752ab767ff835a01a99001d257b65a978612c1d23784f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8646 5488 bytes
font_01_sfnt_off000098df.bin
b0ad4bc861376abea5963e845ba5d67102faea687cf0905fd883ee57d29a613c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98DF 15832 bytes

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