Malicious PDF — malware analysis report

Static analysis result for SHA-256 014946395a42af6c…

MALICIOUS

PDF

45.7 KB Created: 2020-08-26 18:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c38bf48eaffbf981682b413f95e6e02 SHA-1: 43fb0671f99863952c85aa8f5675021b1019e274 SHA-256: 014946395a42af6cae411c137ccf9f69b68b4a8cc910d5347091445e488cc6c9
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'celine dion piano sheet music' and the malicious URL, suggesting a lure to download potentially harmful content. The ML classifier strongly supports the malicious verdict.

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=incredible+celine+dion+piano+sheet+m
    • http://pitidez.nabispen.com/uploads/1/3/0/9/130969077/3652065.pdf
    • http://vezesi.helpinghandsrescue.org/uploads/1/3/2/8/132815806/dizaku_webeto_dimokekipune_tones.pdf
    • http://wogaz.valleyeye.org/uploads/1/3/0/8/130874410/fetubowipegoki-zivetoj.pdf
    • http://files.stjosephschurchupminster.com/uploads/1/3/2/6/132681026/lolusivawexeno.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4971/1781/files/major_guitar_chords_chart.pdf
    • https://cdn.shopify.com/s/files/1/0437/5255/4657/files/snoqualmie_pass_weather_forecast_10_day.pdf
    • https://cdn.shopify.com/s/files/1/0429/4528/2214/files/gidawemerapedadag.pdf
    • https://cdn.shopify.com/s/files/1/0431/2150/8506/files/vexavawepi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3857/files/damufidotajejo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5699/5233/files/tizunoroferezojarimuxiki.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7732/files/medicinal_plants_antidiabetic_activity.pdf
    • https://cdn.shopify.com/s/files/1/0430/2798/8634/files/98652557008.pdf
    • https://cdn.shopify.com/s/files/1/0433/0605/7888/files/rogetazoferalumusi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/tijugerosaxejizole.pdf
    • https://cdn.shopify.com/s/files/1/0432/0329/7438/files/totajawononapivi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/determining_the_limiting_reactant_virtual_lab_answers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000746a.bin
532e354b63a12a90c2d9d635336cb999ffc8a78cd65e80243982335341451d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x746A 5392 bytes
font_01_sfnt_off00008679.bin
62c704db574ba7ac6c9fa209869ecf6bce4efc41f93234346839ba4b6b8e1c08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8679 10400 bytes

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