Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c60bcdc713b32e…

MALICIOUS

PDF

34.5 KB Created: 2020-08-28 00:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6321bea7e988caae4f6d7cbb1fd3942 SHA-1: a9710aba34d8ef3382432a353665421bfd301f7f SHA-256: 54c60bcdc713b32efdb19847c22874f3032c09f8a7cfa90a01ecb7a2922b704e
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure (https://ttraff.cc/pify?keyword=irem+derici+kalbimin+tek+sahibi+indir), suggesting a phishing or malware distribution attempt. Another heuristic detected a large PDF link farm hosted on cdn.shopify.com, indicating a potential SEO poisoning or content manipulation tactic. No scripts were extracted from this sample, but the extensive use of malicious redirectors points towards a delivery mechanism for further malicious payloads.

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=irem+derici+kalbimin+tek+sahibi+indir
    • http://files.blueheronherbary.com/uploads/1/3/0/8/130814078/nimikoxonupu-rezipix-xibibafibe-xujikapotu.pdf
    • http://wijigeji.gpsafety.net/uploads/1/3/2/7/132740836/koxepurig_morujepux_xisajimekena.pdf
    • http://texewife.orderyourbluebook.com/uploads/1/3/2/6/132696212/287138.pdf
    • http://files.savefmcp.org/uploads/1/3/2/6/132682790/juludej.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/88617898608.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/72739331317.pdf
    • https://cdn.shopify.com/s/files/1/0431/4605/1744/files/73387103194.pdf
    • https://cdn.shopify.com/s/files/1/0431/4634/6657/files/42391660660.pdf
    • https://cdn.shopify.com/s/files/1/0429/8620/9439/files/91155990480.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7917/files/spartan_race_training_plan.pdf
    • https://cdn.shopify.com/s/files/1/0440/4350/1733/files/temperamentos_transformados_download_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/nasm_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/fahrenheit_451_guided_reading_questions_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51730359377.pdf
    • https://cdn.shopify.com/s/files/1/0438/9063/9016/files/euler_totient_function.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8520/9507/files/37405031526.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_off0000474a.bin
a4f4515f03d6596ef41283cf928c64f699092ed7d33fbd5678f71d890cbd0980		 pdf-font-stream PDF embedded font (sfnt) at offset 0x474A 5320 bytes
font_01_sfnt_off00005928.bin
57d83dbbd554b2ab8c6796218e0bfd25b7f9751be8b002cacf1f4fcb3def9dc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5928 10920 bytes

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